THE COLLECTION
A READING ROOM OF IDEAS REASONED ALOUD
What the shelf is made of.
1555 explanations, 157 hours 25 minutes of reading, a median piece of 6 minutes. The table sorts and its columns resize.
By broad domain
25Most-used categories
20 shownEvery explanation
1555| Shelfmark | Explanation | Domain | Min | Terms | Added |
|---|---|---|---|---|---|
| CDA·01 | A calibrated role | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| MIN·01 | A fine that became a price | Mind & Behavior | 6 | 3 | 2026-07-27 |
| CDA·02 | A notification you did not ask for | Computing, Data & AI | 7 | 6 | 2026-07-26 |
| PHI·01 | A relic proved false | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| CDA·03 | A schema read by two audiences | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·04 | A secret you never send | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| PHY·01 | A spinning coin's last rattle | Physics | 6 | 3 | 2026-07-26 |
| CDA·05 | A tree in a table of rows | Computing, Data & AI | 7 | 6 | 2026-07-26 |
| CDA·06 | A tree that rearranges itself | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·07 | A valid token in the wrong place | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| EDU·01 | Ability grouping | Education & Learning | 6 | 4 | 2026-07-26 |
| LAN·01 | Accent and perceived competence | Language, Media & Communication | 6 | 2 | 2026-07-26 |
| ENG·01 | Acceptance sampling | Engineering & Technology | 6 | 5 | 2026-07-27 |
| MAT·01 | Adaptive step size | Mathematics & Statistics | 6 | 5 | 2026-07-27 |
| CDA·08 | Adding a machine without moving the data | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CHM·01 | Adhesion | Chemistry & Materials | 6 | 6 | 2026-07-26 |
| FAM·01 | Adolescent risk | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| FAM·02 | Adolescent-parent conflict | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| FAM·03 | Adoption search | Family, Relationships & Human Development | 7 | 1 | 2026-07-26 |
| MIN·02 | Adult attachment patterns | Mind & Behavior | 6 | 4 | 2026-07-26 |
| MED·01 | Advance directives | Health & Medicine | 6 | 5 | 2026-07-27 |
| ECO·01 | Adverse selection | Economics & Business | 6 | 4 | 2026-07-26 |
| EDU·02 | Advice from top students | Education & Learning | 6 | 3 | 2026-07-27 |
| ECO·02 | Aftermarket pricing | Economics & Business | 7 | 4 | 2026-07-26 |
| HIS·01 | Age heaping | History, Society & Anthropology | 6 | 1 | 2026-07-26 |
| CDA·09 | Agreeing the shape before the substance | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| ENV·01 | Agroforestry overyielding | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| WRK·01 | Air balancing | Work, Careers & Skilled Trades | 6 | 3 | 2026-07-26 |
| MIL·01 | Airborne drop dispersion | Military, Conflict & Strategic Studies | 6 | 2 | 2026-07-26 |
| TRV·01 | Aircraft separation minima | Travel, Tourism & Hospitality | 6 | 5 | 2026-07-27 |
| ENG·02 | Airplane cabin pressure | Engineering & Technology | 4 | 4 | 2026-07-25 |
| TRV·02 | Airport access road widening | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-27 |
| TRV·03 | Airport layout | Travel, Tourism & Hospitality | 6 | 5 | 2026-07-26 |
| TRV·04 | Airport slot grandfathering | Travel, Tourism & Hospitality | 7 | 4 | 2026-07-26 |
| WRK·02 | Alert fatigue | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| ENG·03 | Aliasing | Engineering & Technology | 7 | 4 | 2026-07-26 |
| MED·02 | Allergy | Health & Medicine | 6 | 4 | 2026-07-26 |
| MIL·02 | Alliance free-riding | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-27 |
| CHM·02 | Alloy strength | Chemistry & Materials | 6 | 5 | 2026-07-26 |
| SPT·01 | Altitude training | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| CHM·03 | Ammonia synthesis | Chemistry & Materials | 6 | 3 | 2026-07-26 |
| MIL·03 | Amphibious buildup | Military, Conflict & Strategic Studies | 6 | 2 | 2026-07-26 |
| EAR·01 | Amphidromic points | Earth, Climate & Oceans | 6 | 3 | 2026-07-26 |
| HIS·02 | Ancient population estimates | History, Society & Anthropology | 6 | 3 | 2026-07-26 |
| MIN·03 | Anger as a commitment device | Mind & Behavior | 6 | 4 | 2026-07-27 |
| PHI·02 | Anonymous giving | Philosophy, Ethics & Religion | 6 | 3 | 2026-07-26 |
| AST·01 | Anonymous telescope-time proposals | Astronomy & Space | 6 | 3 | 2026-07-27 |
| AST·02 | Antarctic meteorite concentration | Astronomy & Space | 6 | 3 | 2026-07-26 |
| EAR·02 | Antarctic ozone hole | Earth, Climate & Oceans | 6 | 2 | 2026-07-26 |
| ENG·04 | Antenna ground plane | Engineering & Technology | 7 | 3 | 2026-07-26 |
| PHY·02 | Anti-reflective coating | Physics | 6 | 3 | 2026-07-26 |
| MED·03 | Antibiotic course length | Health & Medicine | 7 | 4 | 2026-07-26 |
| BIO·01 | Antibody affinity maturation | Biology & Ecology | 6 | 2 | 2026-07-26 |
| MED·04 | Antiviral difficulty | Health & Medicine | 6 | 3 | 2026-07-26 |
| PHI·03 | Apology and repair | Philosophy, Ethics & Religion | 7 | 4 | 2026-07-26 |
| ART·01 | Apparent motion | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| GOV·01 | Appellate deference | Government, Law & Civics | 6 | 3 | 2026-07-26 |
| HOM·01 | Appliance signatures in meter data | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-27 |
| HIS·03 | Apprenticeship indentures | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| CDA·10 | Approximate nearest neighbour search | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| EAR·03 | Aquifer depletion | Earth, Climate & Oceans | 6 | 4 | 2026-07-27 |
| ART·02 | Architectural atmosphere | Arts, Design & Culture | 7 | 4 | 2026-07-26 |
| FAM·04 | Arranged and chosen marriages | Family, Relationships & Human Development | 6 | 0 | 2026-07-26 |
| TRV·05 | Asymmetric flight times | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| MIL·04 | Asymmetric warfare | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| SPT·02 | Athlete biological passport | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| EAR·04 | Atmospheric scale height | Earth, Climate & Oceans | 6 | 4 | 2026-07-27 |
| AST·03 | Atmospheric seeing limit | Astronomy & Space | 6 | 4 | 2026-07-26 |
| FAM·05 | Attachment | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| CDA·11 | Attention as a budget | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| MIN·04 | Attribution asymmetry | Mind & Behavior | 6 | 5 | 2026-07-26 |
| ECO·03 | Auction prices | Economics & Business | 5 | 4 | 2026-07-26 |
| AST·04 | Aurora | Astronomy & Space | 6 | 4 | 2026-07-26 |
| TRV·06 | Authenticity | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| ENG·05 | Autofrettage of pressure vessels | Engineering & Technology | 6 | 5 | 2026-07-27 |
| MED·05 | Autoimmunity | Health & Medicine | 6 | 4 | 2026-07-26 |
| CDA·12 | Autonomy as a dial | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| MAT·02 | Averaging times of day | Mathematics & Statistics | 6 | 5 | 2026-07-27 |
| CHM·04 | Azeotropes | Chemistry & Materials | 6 | 2 | 2026-07-26 |
| CDA·13 | Backfilling a pipeline | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| WRK·03 | Backlash | Work, Careers & Skilled Trades | 6 | 0 | 2026-07-26 |
| CDA·14 | Backpressure | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·15 | Backward compatibility | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| BIO·02 | Bacterial dormancy | Biology & Ecology | 6 | 4 | 2026-07-26 |
| TRV·07 | Baggage reconciliation | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| ECO·04 | Balance of payments identity | Economics & Business | 6 | 5 | 2026-07-27 |
| BIO·03 | Balanced sex ratios | Biology & Ecology | 6 | 4 | 2026-07-26 |
| WRK·04 | Balanced veneer | Work, Careers & Skilled Trades | 6 | 3 | 2026-07-26 |
| PHY·03 | Ballast in a gas discharge | Physics | 7 | 3 | 2026-07-26 |
| PHY·04 | Ballast shakedown under repeated loading | Physics | 6 | 7 | 2026-07-27 |
| ENV·02 | Banded vegetation in drylands | Environment, Agriculture & Food | 7 | 4 | 2026-07-27 |
| ECO·05 | Bank capital buffers | Economics & Business | 6 | 5 | 2026-07-27 |
| ECO·06 | Bank money creation | Economics & Business | 5 | 4 | 2026-07-26 |
| ECO·07 | Bank runs | Economics & Business | 6 | 4 | 2026-07-26 |
| HOM·02 | Bass through walls | Home, Consumer & Everyday Life | 6 | 0 | 2026-07-26 |
| CDA·16 | Batching and the throughput trade | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| ENG·06 | Bathtub failure curve | Engineering & Technology | 6 | 4 | 2026-07-26 |
| HOM·03 | Battery ageing | Home, Consumer & Everyday Life | 6 | 5 | 2026-07-26 |
| MAT·03 | Bayesian updating | Mathematics & Statistics | 4 | 3 | 2026-07-25 |
| MED·06 | Bed rest harm | Health & Medicine | 6 | 3 | 2026-07-26 |
| PHI·04 | Believing at will | Philosophy, Ethics & Religion | 7 | 4 | 2026-07-26 |
| CDA·17 | Benchmark saturation | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| WRK·05 | Bend allowance | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| MAT·04 | Benford's law | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| ENV·03 | Best-before versus use-by | Environment, Agriculture & Food | 6 | 4 | 2026-07-27 |
| ART·03 | Bias-cut cloth | Arts, Design & Culture | 6 | 3 | 2026-07-26 |
| PHY·05 | Bicycle stability | Physics | 6 | 3 | 2026-07-26 |
| MIN·05 | Binocular rivalry | Mind & Behavior | 6 | 4 | 2026-07-26 |
| MAT·05 | Birthday problem | Mathematics & Statistics | 5 | 3 | 2026-07-26 |
| WRK·06 | Blameless review | Work, Careers & Skilled Trades | 7 | 4 | 2026-07-26 |
| CDA·18 | Blast radius | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| PHY·06 | Blind analysis | Physics | 6 | 7 | 2026-07-27 |
| MAT·06 | Block design existence | Mathematics & Statistics | 6 | 2 | 2026-07-26 |
| MIL·05 | Blockade and resolve | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| MED·07 | Blood compatibility | Health & Medicine | 6 | 5 | 2026-07-26 |
| MED·08 | Blood donation supply | Health & Medicine | 6 | 4 | 2026-07-27 |
| CDA·19 | Bloom filters | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| MIN·06 | Blushing | Mind & Behavior | 6 | 4 | 2026-07-26 |
| ECO·08 | Board independence | Economics & Business | 6 | 2 | 2026-07-26 |
| TRV·08 | Boarding order | Travel, Tourism & Hospitality | 6 | 0 | 2026-07-26 |
| ENG·07 | Bolt preload | Engineering & Technology | 6 | 3 | 2026-07-26 |
| MED·09 | Bone remodelling | Health & Medicine | 6 | 5 | 2026-07-26 |
| GEO·01 | Border prosperity discontinuity | Geography & Regional Studies | 6 | 2 | 2026-07-26 |
| TRV·09 | Border queue surges | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-26 |
| GEO·02 | Borders | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| ECO·09 | Boundaries of the firm | Economics & Business | 6 | 4 | 2026-07-26 |
| CDA·20 | Bounded contexts | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| SPT·03 | Box score representation | Sports, Exercise & Recreation | 6 | 5 | 2026-07-27 |
| MAT·07 | Braess's paradox | Mathematics & Statistics | 6 | 4 | 2026-07-27 |
| MIN·07 | Brain lateralization | Mind & Behavior | 6 | 4 | 2026-07-27 |
| CDA·21 | Branch prediction | Computing, Data & AI | 7 | 2 | 2026-07-26 |
| ECO·10 | Brand advertising | Economics & Business | 6 | 5 | 2026-07-26 |
| PHY·07 | Brazil-nut effect | Physics | 6 | 3 | 2026-07-26 |
| ENV·04 | Bread staling | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| SPT·04 | Breathing urge | Sports, Exercise & Recreation | 5 | 4 | 2026-07-26 |
| PHY·08 | Brewster angle glare | Physics | 6 | 3 | 2026-07-26 |
| HIS·04 | Bridewealth and dowry | History, Society & Anthropology | 6 | 3 | 2026-07-26 |
| GOV·02 | Bright-line rules | Government, Law & Civics | 6 | 5 | 2026-07-26 |
| LAN·02 | Broadcast loudness | Language, Media & Communication | 7 | 4 | 2026-07-26 |
| GOV·03 | Budget scoring windows | Government, Law & Civics | 6 | 3 | 2026-07-26 |
| TRV·10 | Buffet holding time | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-26 |
| CDA·22 | Build cache geometry | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·23 | Building somewhere you do not ship from | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| ENG·08 | Building sway | Engineering & Technology | 6 | 5 | 2026-07-26 |
| CDA·24 | Built never to be rebuilt | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·25 | Bulkheads | Computing, Data & AI | 6 | 2 | 2026-07-26 |
| SPT·05 | Bullpen specialization | Sports, Exercise & Recreation | 6 | 5 | 2026-07-27 |
| ECO·11 | Bullwhip effect | Economics & Business | 6 | 4 | 2026-07-26 |
| PHY·09 | Buoyancy | Physics | 6 | 4 | 2026-07-26 |
| PHI·05 | Burden of proof | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| CHM·05 | Butter from cream | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| MIN·08 | Bystander effect | Mind & Behavior | 6 | 4 | 2026-07-26 |
| CDA·26 | Caching | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| CDA·27 | Caching an answer nobody asked for exactly | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| GEO·03 | Cadastral survey patterns | Geography & Regional Studies | 7 | 4 | 2026-07-26 |
| HIS·05 | Calendar drift | History, Society & Anthropology | 6 | 5 | 2026-07-26 |
| ART·04 | Cancelled printing plates | Arts, Design & Culture | 6 | 5 | 2026-07-27 |
| CHM·06 | Candle wick | Chemistry & Materials | 6 | 5 | 2026-07-26 |
| ART·05 | Canon formation | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| ART·06 | Canvas tension and humidity | Arts, Design & Culture | 6 | 6 | 2026-07-27 |
| CDA·28 | Capability negotiation | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| ENG·09 | Capacitive sensing | Engineering & Technology | 6 | 5 | 2026-07-26 |
| CHM·07 | Carbon allotropes | Chemistry & Materials | 6 | 5 | 2026-07-26 |
| EAR·05 | Carbon offset additionality | Earth, Climate & Oceans | 6 | 5 | 2026-07-27 |
| MED·10 | Cardiac fibrillation | Health & Medicine | 6 | 5 | 2026-07-27 |
| FAM·06 | Caregiver of last resort | Family, Relationships & Human Development | 7 | 0 | 2026-07-26 |
| FAM·07 | Caregiving load | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| ECO·12 | Carry trade | Economics & Business | 7 | 4 | 2026-07-27 |
| MED·11 | Cartilage healing | Health & Medicine | 7 | 4 | 2026-07-26 |
| SPT·06 | Carving ski sidecut | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| ENV·05 | Cassava processing | Environment, Agriculture & Food | 7 | 3 | 2026-07-26 |
| CHM·08 | Cast-iron seasoning | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| MIL·06 | Casualty evacuation | Military, Conflict & Strategic Studies | 6 | 2 | 2026-07-26 |
| CHM·09 | Catalysis | Chemistry & Materials | 6 | 5 | 2026-07-26 |
| ECO·13 | Catastrophe reinsurance | Economics & Business | 6 | 2 | 2026-07-26 |
| MAT·08 | Catastrophic cancellation | Mathematics & Statistics | 6 | 3 | 2026-07-26 |
| LAN·03 | Categorical perception of speech sounds | Language, Media & Communication | 6 | 5 | 2026-07-27 |
| PHI·06 | Causal closure of the physical | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-27 |
| EAR·06 | Cave formation | Earth, Climate & Oceans | 6 | 6 | 2026-07-26 |
| EDU·03 | Ceiling on admissions prediction | Education & Learning | 6 | 3 | 2026-07-27 |
| ART·07 | Cello wolf tone | Arts, Design & Culture | 6 | 3 | 2026-07-26 |
| BIO·04 | Cells that defect on the body | Biology & Ecology | 6 | 5 | 2026-07-27 |
| MAT·09 | Cellular automata | Mathematics & Statistics | 6 | 3 | 2026-07-26 |
| CHM·10 | Cement hardening | Chemistry & Materials | 6 | 5 | 2026-07-26 |
| MAT·10 | Censored follow-up | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| GOV·04 | Census undercount | Government, Law & Civics | 6 | 5 | 2026-07-26 |
| MED·12 | Central sensitization | Health & Medicine | 6 | 4 | 2026-07-26 |
| HIS·06 | Ceramic seriation | History, Society & Anthropology | 7 | 4 | 2026-07-26 |
| WRK·07 | Ceremony as a smell | Work, Careers & Skilled Trades | 7 | 3 | 2026-07-26 |
| CHM·11 | Chain-branching explosion limits | Chemistry & Materials | 7 | 4 | 2026-07-26 |
| CDA·29 | Chain-of-thought | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| ART·08 | Chance in the wood-fired kiln | Arts, Design & Culture | 6 | 5 | 2026-07-27 |
| LAN·04 | Chance word resemblances | Language, Media & Communication | 6 | 5 | 2026-07-27 |
| CDA·30 | Change data capture | Computing, Data & AI | 7 | 6 | 2026-07-26 |
| CDA·31 | Chaos engineering | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| HOM·04 | Charging connector standards | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-27 |
| HOM·05 | Charm pricing | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| ENV·06 | Cheese ripening | Environment, Agriculture & Food | 7 | 0 | 2026-07-26 |
| CHM·12 | Chelate effect | Chemistry & Materials | 6 | 2 | 2026-07-26 |
| MIL·07 | Chemical protective posture | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| MED·13 | Chemotherapy selectivity | Health & Medicine | 6 | 3 | 2026-07-26 |
| FAM·08 | Child fostering | Family, Relationships & Human Development | 6 | 1 | 2026-07-26 |
| FAM·09 | Child word learning | Family, Relationships & Human Development | 5 | 3 | 2026-07-26 |
| FAM·10 | Children's play | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| ENV·07 | Chilling injury in fruit | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| ENG·10 | Chip yield and die size | Engineering & Technology | 6 | 0 | 2026-07-26 |
| MIN·09 | Choice overload | Mind & Behavior | 6 | 4 | 2026-07-26 |
| SPT·07 | Choking under attention | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| CDA·32 | Choosing an indicator | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| CDA·33 | Choosing the first piece to replace | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·34 | Choosing what to forget | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·35 | Choreography versus orchestration | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| MED·14 | Chronotherapy | Health & Medicine | 6 | 4 | 2026-07-27 |
| CDA·36 | Chunking | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·37 | Circuit breakers | Computing, Data & AI | 6 | 2 | 2026-07-26 |
| ENG·11 | Circuit schematics versus layout | Engineering & Technology | 6 | 4 | 2026-07-27 |
| CDA·38 | Citation without verification | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| GEO·04 | City location | Geography & Regional Studies | 5 | 3 | 2026-07-26 |
| LAN·05 | City-to-city spread of speech forms | Language, Media & Communication | 6 | 6 | 2026-07-27 |
| GOV·05 | Civil service tenure | Government, Law & Civics | 6 | 3 | 2026-07-26 |
| MIL·08 | Civilian control | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| EDU·04 | Class-size cutoff rules | Education & Learning | 6 | 4 | 2026-07-26 |
| EDU·05 | Classroom misconceptions | Education & Learning | 5 | 4 | 2026-07-26 |
| ECO·14 | Cleansing effect of recessions | Economics & Business | 6 | 5 | 2026-07-27 |
| LAN·06 | Clickbait headlines | Language, Media & Communication | 7 | 0 | 2026-07-26 |
| EAR·07 | Climate model parameterization | Earth, Climate & Oceans | 6 | 6 | 2026-07-27 |
| SPT·08 | Climbing grade drift | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| SPT·09 | Climbing versus descending weight | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| CDA·39 | Clock synchronization | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| FAM·11 | Closeness-distance balance | Family, Relationships & Human Development | 6 | 4 | 2026-07-27 |
| HOM·06 | Clothing size labels | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-27 |
| HOM·07 | Cloudy ice cubes | Home, Consumer & Everyday Life | 6 | 3 | 2026-07-26 |
| WRK·08 | Clustered breakdowns | Work, Careers & Skilled Trades | 5 | 4 | 2026-07-27 |
| HOM·08 | Clutter | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| GOV·06 | Coalition formation | Government, Law & Civics | 6 | 3 | 2026-07-26 |
| MIL·09 | Coalition friction | Military, Conflict & Strategic Studies | 6 | 0 | 2026-07-26 |
| EAR·08 | Coastal dead zones | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| GEO·05 | Coastal fog belts | Geography & Regional Studies | 7 | 3 | 2026-07-26 |
| MAT·11 | Coastline paradox | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| MIN·10 | Cocktail party effect | Mind & Behavior | 6 | 4 | 2026-07-26 |
| CDA·40 | Code that never runs, and code that runs once a year | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| MIN·11 | Cognitive dissonance | Mind & Behavior | 7 | 3 | 2026-07-26 |
| MIN·12 | Cognitive reserve | Mind & Behavior | 6 | 4 | 2026-07-27 |
| BIO·05 | Cohesion-tension sap ascent | Biology & Ecology | 6 | 4 | 2026-07-26 |
| HOM·09 | Coiled extension lead | Home, Consumer & Everyday Life | 6 | 3 | 2026-07-26 |
| HOM·10 | Cold floors | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| CDA·41 | Cold starts | Computing, Data & AI | 7 | 6 | 2026-07-26 |
| HOM·11 | Cold-spot condensation | Home, Consumer & Everyday Life | 6 | 0 | 2026-07-26 |
| MED·15 | Collateral circulation | Health & Medicine | 6 | 4 | 2026-07-27 |
| CDA·42 | Collecting changes before committing them | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| BIO·06 | Collective ant behavior | Biology & Ecology | 5 | 4 | 2026-07-26 |
| PHI·07 | Collective responsibility | Philosophy, Ethics & Religion | 6 | 2 | 2026-07-26 |
| CHM·13 | Colloid flocculation | Chemistry & Materials | 6 | 2 | 2026-07-26 |
| ART·09 | Color mixing | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| MIL·10 | Combat overclaiming | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-27 |
| MIL·11 | Combatant identification | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| MIL·12 | Combined arms | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-27 |
| AST·05 | Comet tails | Astronomy & Space | 6 | 4 | 2026-07-26 |
| FAM·12 | Comfort objects | Family, Relationships & Human Development | 6 | 4 | 2026-07-27 |
| CDA·43 | Commands and events | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| EAR·09 | Committed warming | Earth, Climate & Oceans | 6 | 5 | 2026-07-27 |
| GOV·07 | Committee gatekeeping | Government, Law & Civics | 6 | 5 | 2026-07-27 |
| GEO·06 | Common high pasture | Geography & Regional Studies | 6 | 3 | 2026-07-26 |
| EAR·10 | Common vertical datum | Earth, Climate & Oceans | 6 | 6 | 2026-07-27 |
| ECO·15 | Comparative advantage | Economics & Business | 5 | 3 | 2026-07-26 |
| CDA·44 | Compatibility has a direction | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| MED·16 | Compensated shock | Health & Medicine | 6 | 0 | 2026-07-26 |
| LAN·07 | Compensatory lengthening | Language, Media & Communication | 6 | 5 | 2026-07-27 |
| MAT·12 | Completing a collection | Mathematics & Statistics | 6 | 3 | 2026-07-26 |
| MAT·13 | Compositeness without factors | Mathematics & Statistics | 7 | 5 | 2026-07-26 |
| CDA·45 | Composition over inheritance | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| ENV·08 | Compost heat | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| ECO·16 | Compound interest | Economics & Business | 6 | 5 | 2026-07-25 |
| GOV·08 | Compounding debt service | Government, Law & Civics | 6 | 4 | 2026-07-27 |
| GEO·07 | Compromise capitals | Geography & Regional Studies | 6 | 2 | 2026-07-26 |
| GOV·09 | Compulsory taxation | Government, Law & Civics | 6 | 5 | 2026-07-26 |
| ART·10 | Concert hall reverberation | Arts, Design & Culture | 6 | 5 | 2026-07-26 |
| ART·11 | Concert pitch standard | Arts, Design & Culture | 7 | 3 | 2026-07-26 |
| GOV·10 | Conditional spending grants | Government, Law & Civics | 6 | 3 | 2026-07-26 |
| CDA·46 | Confident model errors | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·47 | Configuration drift | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| MIN·13 | Conformity | Mind & Behavior | 6 | 4 | 2026-07-26 |
| MAT·14 | Confounded factorial effects | Mathematics & Statistics | 6 | 2 | 2026-07-26 |
| CDA·48 | Congestion collapse | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| CDA·49 | Connection exhaustion before CPU | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| ENV·09 | Conservation easements | Environment, Agriculture & Food | 6 | 5 | 2026-07-27 |
| HIS·07 | Conspicuous display | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| BIO·07 | Conspicuous signals | Biology & Ecology | 6 | 4 | 2026-07-26 |
| GOV·11 | Constitutional entrenchment | Government, Law & Civics | 6 | 5 | 2026-07-26 |
| ECO·17 | Consumer price index construction | Economics & Business | 6 | 5 | 2026-07-27 |
| MIN·14 | Contagious yawning | Mind & Behavior | 6 | 3 | 2026-07-26 |
| CDA·50 | Content delivery networks | Computing, Data & AI | 7 | 1 | 2026-07-26 |
| CDA·51 | Context window | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| TRV·11 | Contingency fuel | Travel, Tourism & Hospitality | 6 | 5 | 2026-07-26 |
| ART·12 | Continuity editing | Arts, Design & Culture | 6 | 3 | 2026-07-26 |
| CDA·52 | Continuity over a protocol with no memory | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| GEO·08 | Contour lines | Geography & Regional Studies | 6 | 4 | 2026-07-27 |
| CDA·53 | Control as a classification | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·54 | Control plane and data plane | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| PHY·10 | Convection cells | Physics | 6 | 3 | 2026-07-26 |
| BIO·08 | Convergent evolution | Biology & Ecology | 6 | 4 | 2026-07-26 |
| PHI·08 | Convergent moral prohibitions | Philosophy, Ethics & Religion | 6 | 3 | 2026-07-27 |
| LAN·08 | Conversation turn-taking | Language, Media & Communication | 5 | 3 | 2026-07-26 |
| MIL·13 | Convoy protection | Military, Conflict & Strategic Studies | 6 | 0 | 2026-07-26 |
| HOM·12 | Cooling a room with a fridge | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| GEO·09 | Cooling with altitude | Geography & Regional Studies | 6 | 5 | 2026-07-26 |
| WRK·09 | Coordination cost | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| CDA·55 | Copying something you can only question | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| EAR·11 | Coral bleaching | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| MAT·15 | Corner solutions | Mathematics & Statistics | 7 | 4 | 2026-07-26 |
| CHM·14 | Corrosion | Chemistry & Materials | 5 | 5 | 2026-07-26 |
| CDA·56 | CORS in the web | Computing, Data & AI | 6 | 6 | 2026-07-25 |
| ENV·10 | Cosmetic produce standards | Environment, Agriculture & Food | 7 | 3 | 2026-07-26 |
| AST·06 | Cosmic distance ladder | Astronomy & Space | 7 | 4 | 2026-07-26 |
| ECO·18 | Cost disease | Economics & Business | 6 | 3 | 2026-07-26 |
| BIO·09 | Cost of sexual reproduction | Biology & Ecology | 6 | 4 | 2026-07-26 |
| PHI·09 | Costly religious demands | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| BIO·10 | Countercurrent heat exchange | Biology & Ecology | 6 | 4 | 2026-07-26 |
| CDA·57 | Counting steps instead of timing | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| MAT·16 | Coupled oscillator synchronization | Mathematics & Statistics | 6 | 4 | 2026-07-27 |
| CDA·58 | Coupling | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| PHY·11 | Cracked bell tone | Physics | 7 | 3 | 2026-07-26 |
| WRK·10 | Crane signalling | Work, Careers & Skilled Trades | 7 | 0 | 2026-07-26 |
| EDU·06 | Credential inflation | Education & Learning | 6 | 3 | 2026-07-26 |
| ECO·19 | Credit | Economics & Business | 6 | 4 | 2026-07-26 |
| ECO·20 | Credit ratings cliff | Economics & Business | 6 | 5 | 2026-07-27 |
| EDU·07 | Credit transfer between institutions | Education & Learning | 6 | 4 | 2026-07-27 |
| LAN·09 | Creole genesis | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| CHM·15 | Crevice corrosion | Chemistry & Materials | 6 | 2 | 2026-07-26 |
| PHY·12 | Critical mass | Physics | 6 | 5 | 2026-07-26 |
| ENV·11 | Crop gene banks | Environment, Agriculture & Food | 6 | 6 | 2026-07-27 |
| ENV·12 | Crop rotation | Environment, Agriculture & Food | 5 | 3 | 2026-07-26 |
| TRV·12 | Cross-border shopping trips | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-27 |
| HIS·08 | Cross-cousin marriage | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| ECO·21 | Cross-docking | Economics & Business | 6 | 4 | 2026-07-26 |
| MIN·15 | Crowd crush | Mind & Behavior | 7 | 4 | 2026-07-26 |
| TRV·13 | Cruise call clustering | Travel, Tourism & Hospitality | 6 | 2 | 2026-07-26 |
| ENG·12 | Crumple zones | Engineering & Technology | 6 | 3 | 2026-07-26 |
| MIL·14 | Culminating point of an offensive | Military, Conflict & Strategic Studies | 7 | 0 | 2026-07-26 |
| MIN·16 | Cumulative advantage in popularity | Mind & Behavior | 6 | 4 | 2026-07-27 |
| MIN·17 | Curiosity as an information gap | Mind & Behavior | 6 | 3 | 2026-07-27 |
| ECO·22 | Currency peg collapse | Economics & Business | 6 | 3 | 2026-07-26 |
| MAT·17 | Curse of dimensionality | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| EDU·08 | Curse of knowledge in teaching | Education & Learning | 6 | 3 | 2026-07-26 |
| GOV·12 | Customary international law | Government, Law & Civics | 6 | 5 | 2026-07-27 |
| EDU·09 | Cut scores on licensing exams | Education & Learning | 6 | 2 | 2026-07-26 |
| MAT·18 | Cyclic majorities | Mathematics & Statistics | 6 | 3 | 2026-07-26 |
| ENV·13 | Dairy cow energy balance | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| MIN·18 | Dark adaptation | Mind & Behavior | 6 | 3 | 2026-07-26 |
| AST·07 | Dark night sky | Astronomy & Space | 5 | 4 | 2026-07-26 |
| CDA·59 | Data contracts | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| CDA·60 | Data leakage paths | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| CDA·61 | Data you keep is data you can lose | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·62 | Database transactions | Computing, Data & AI | 4 | 4 | 2026-07-25 |
| WRK·11 | Datum lines on site | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-27 |
| MIN·19 | Dawn light and the body clock | Mind & Behavior | 6 | 3 | 2026-07-26 |
| CDA·63 | Dead or just slow? | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| ART·13 | Death and art prices | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| HIS·09 | Debt jubilees | History, Society & Anthropology | 6 | 4 | 2026-07-27 |
| CDA·64 | Deciding apart from enforcing | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| MIN·20 | Decision fatigue | Mind & Behavior | 6 | 5 | 2026-07-26 |
| MIL·15 | Decision-cycle tempo | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-27 |
| CDA·65 | Declaring the destination, not the route | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| AST·08 | Deconditioning in weightlessness | Astronomy & Space | 6 | 4 | 2026-07-27 |
| ENG·13 | Dedicated machine tools | Engineering & Technology | 6 | 4 | 2026-07-27 |
| EAR·12 | Deep sound channel | Earth, Climate & Oceans | 6 | 2 | 2026-07-26 |
| MIL·16 | Defender's advantage | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-26 |
| MAT·19 | Degrees of freedom | Mathematics & Statistics | 6 | 4 | 2026-07-27 |
| MIN·21 | Deja vu | Mind & Behavior | 6 | 4 | 2026-07-26 |
| MIN·22 | Delay discounting | Mind & Behavior | 6 | 3 | 2026-07-26 |
| LAN·10 | Delayed auditory feedback | Language, Media & Communication | 6 | 4 | 2026-07-27 |
| SPT·10 | Delayed muscle soreness | Sports, Exercise & Recreation | 5 | 3 | 2026-07-26 |
| ENG·14 | Delayed weld cracking | Engineering & Technology | 7 | 3 | 2026-07-26 |
| MIL·17 | Delegated launch authority | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-26 |
| CDA·66 | Delegation without the password | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| WRK·12 | Deliberate practice | Work, Careers & Skilled Trades | 4 | 3 | 2026-07-26 |
| CDA·67 | Deliberately slow password checks | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| CDA·68 | Delimiters as a boundary | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| CDA·69 | Delivered versus retained | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| GEO·10 | Delta subsidence | Geography & Regional Studies | 6 | 3 | 2026-07-26 |
| CDA·70 | Denormalization | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·71 | Dependency conflicts | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·72 | Dependency direction | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·73 | Deploying more to break less | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| EAR·13 | Depth hoar in snowpack | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| GEO·11 | Desert latitudes | Geography & Regional Studies | 6 | 5 | 2026-07-26 |
| CDA·74 | Design by contract | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| ART·14 | Design restraint | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| CDA·75 | Detecting a theft you cannot see | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CHM·16 | Detection limits | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| MIL·18 | Deterrence | Military, Conflict & Strategic Studies | 6 | 5 | 2026-07-26 |
| GOV·13 | Devolved authority | Government, Law & Civics | 6 | 0 | 2026-07-26 |
| MED·17 | Diabetic complications | Health & Medicine | 6 | 4 | 2026-07-26 |
| EDU·10 | Diagnostic distractors | Education & Learning | 6 | 4 | 2026-07-26 |
| LAN·11 | Dialect continuum | Language, Media & Communication | 6 | 5 | 2026-07-27 |
| TRV·14 | Different prices, same room | Travel, Tourism & Hospitality | 6 | 5 | 2026-07-26 |
| LAN·12 | Digital preservation churn | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| LAN·13 | Diglossia | Language, Media & Communication | 6 | 5 | 2026-07-27 |
| ENV·14 | Diminishing fertiliser returns | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| CHM·17 | Directed evolution of enzymes | Chemistry & Materials | 6 | 5 | 2026-07-27 |
| CHM·18 | Disappearing polymorphs | Chemistry & Materials | 6 | 3 | 2026-07-26 |
| GOV·14 | Disaster-driven building codes | Government, Law & Civics | 6 | 4 | 2026-07-27 |
| PHI·10 | Disgust as a moral guide | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-27 |
| HOM·13 | Dishwasher drying | Home, Consumer & Everyday Life | 6 | 3 | 2026-07-26 |
| ECO·23 | Dispersed knowledge in production | Economics & Business | 6 | 5 | 2026-07-27 |
| GEO·12 | Distorted mental geography | Geography & Regional Studies | 6 | 4 | 2026-07-27 |
| CDA·76 | Distributed consensus | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·77 | Distributed tracing | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| GOV·15 | District boundaries | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| FAM·13 | Divorce contagion | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| MIL·19 | Doctrine lag | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-26 |
| CDA·78 | Documentation that points at its evidence | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| PHI·11 | Doing versus allowing | Philosophy, Ethics & Religion | 6 | 3 | 2026-07-26 |
| HIS·10 | Domestication | History, Society & Anthropology | 6 | 5 | 2026-07-26 |
| MIN·23 | Doorway effect | Mind & Behavior | 6 | 3 | 2026-07-26 |
| SPT·11 | Doping arms race | Sports, Exercise & Recreation | 7 | 0 | 2026-07-26 |
| PHY·13 | Doppler effect | Physics | 6 | 3 | 2026-07-26 |
| MED·18 | Dose-response | Health & Medicine | 6 | 4 | 2026-07-26 |
| CDA·79 | Double descent | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| GEO·13 | Doubling cities | Geography & Regional Studies | 6 | 4 | 2026-07-27 |
| GEO·14 | Downdrift beach loss | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| SPT·12 | Drafting in the peloton | Sports, Exercise & Recreation | 6 | 3 | 2026-07-26 |
| WRK·13 | Drain fall | Work, Careers & Skilled Trades | 6 | 0 | 2026-07-26 |
| CDA·80 | Drawing the same model three times | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| PHY·14 | Drift in accepted values of constants | Physics | 6 | 5 | 2026-07-27 |
| MAT·20 | Dropping incomplete records | Mathematics & Statistics | 6 | 5 | 2026-07-26 |
| MED·19 | Drug tolerance | Health & Medicine | 6 | 4 | 2026-07-26 |
| HOM·14 | Dry drain trap | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| ART·15 | Drypoint burr | Arts, Design & Culture | 6 | 3 | 2026-07-26 |
| CDA·81 | Durable execution | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| EAR·14 | Dust-fed rainforests | Earth, Climate & Oceans | 7 | 4 | 2026-07-26 |
| LAN·14 | Ear-voice span | Language, Media & Communication | 7 | 0 | 2026-07-26 |
| SPT·13 | Early sport specialization | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| SPT·14 | Early strength gains | Sports, Exercise & Recreation | 6 | 5 | 2026-07-26 |
| ART·16 | Earworms | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| HIS·11 | East-west diffusion | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| AST·09 | Eclipse seasons | Astronomy & Space | 6 | 3 | 2026-07-26 |
| BIO·11 | Ecological succession | Biology & Ecology | 6 | 3 | 2026-07-26 |
| MIL·20 | Economy of force | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-27 |
| PHI·12 | Effortless virtue | Philosophy, Ethics & Religion | 7 | 4 | 2026-07-26 |
| EAR·15 | El Nino oscillation | Earth, Climate & Oceans | 6 | 3 | 2026-07-26 |
| GOV·16 | Election-timed spending | Government, Law & Civics | 6 | 4 | 2026-07-27 |
| GOV·17 | Electoral thresholds | Government, Law & Civics | 6 | 4 | 2026-07-27 |
| CDA·82 | Embedding space | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| PHY·15 | Emergence of temperature | Physics | 6 | 5 | 2026-07-27 |
| GOV·18 | Emergency powers ratchet | Government, Law & Civics | 6 | 2 | 2026-07-26 |
| MED·20 | Emergency triage | Health & Medicine | 6 | 4 | 2026-07-26 |
| EDU·11 | Emergent classroom sign language | Education & Learning | 6 | 5 | 2026-07-27 |
| ART·17 | Emerging pentimenti | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| GOV·19 | Eminent domain compensation | Government, Law & Civics | 6 | 0 | 2026-07-26 |
| MIL·21 | Emissions control | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| ECO·24 | Empty container repositioning | Economics & Business | 6 | 2 | 2026-07-26 |
| GEO·15 | Enclaves | Geography & Regional Studies | 6 | 3 | 2026-07-26 |
| GEO·16 | Endorheic basins | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| GOV·20 | Enforcement discretion | Government, Law & Civics | 6 | 3 | 2026-07-26 |
| ENG·15 | Engine run-in | Engineering & Technology | 7 | 0 | 2026-07-26 |
| ENG·16 | Engineered redundancy | Engineering & Technology | 5 | 3 | 2026-07-26 |
| MAT·21 | Envy-free division | Mathematics & Statistics | 7 | 3 | 2026-07-26 |
| CHM·19 | Enzyme specificity | Chemistry & Materials | 3 | 3 | 2026-07-25 |
| MAT·22 | Equilibrium selection | Mathematics & Statistics | 6 | 4 | 2026-07-27 |
| SPT·15 | Equipment bans in sport | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| CDA·83 | Error budgets | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| MAT·23 | Error cancellation in averages | Mathematics & Statistics | 6 | 5 | 2026-07-26 |
| CDA·84 | Error-correcting codes | Computing, Data & AI | 4 | 4 | 2026-07-25 |
| MIL·22 | Escalation | Military, Conflict & Strategic Studies | 7 | 4 | 2026-07-26 |
| PHY·16 | Escape of light gases from an atmosphere | Physics | 6 | 6 | 2026-07-27 |
| HIS·12 | Ethnic boundary formation | History, Society & Anthropology | 6 | 3 | 2026-07-27 |
| LAN·15 | Euphemism | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| CDA·85 | Evaluating retrieval separately | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| CDA·86 | Evaluation suites | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| HOM·15 | Evaporative drying | Home, Consumer & Everyday Life | 6 | 5 | 2026-07-26 |
| SPT·16 | Even pacing | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| CDA·87 | Event sourcing | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·88 | Event time versus arrival time | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| CDA·89 | Eventual consistency | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| GOV·21 | Everyday legal compliance | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| CDA·90 | Exactly once is a property of the pipeline | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| EDU·12 | Exam equating | Education & Learning | 7 | 4 | 2026-07-26 |
| GOV·22 | Exclusionary rule | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| SPT·17 | Exercise-associated hyponatremia | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| LAN·16 | Exonyms | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| AST·10 | Exoplanet detection | Astronomy & Space | 6 | 4 | 2026-07-26 |
| ECO·25 | Experience rating | Economics & Business | 6 | 2 | 2026-07-26 |
| ECO·26 | Experience-curve pricing | Economics & Business | 6 | 3 | 2026-07-26 |
| WRK·14 | Experienced-worker injuries | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| EDU·13 | Expertise reversal | Education & Learning | 6 | 4 | 2026-07-26 |
| ART·18 | Explained jokes | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| ECO·27 | Exposure problem in package bidding | Economics & Business | 7 | 2 | 2026-07-26 |
| EAR·16 | Extreme event attribution | Earth, Climate & Oceans | 6 | 5 | 2026-07-27 |
| HOM·16 | Fabric softener and absorbency | Home, Consumer & Everyday Life | 6 | 0 | 2026-07-26 |
| MIN·24 | Face recognition | Mind & Behavior | 4 | 4 | 2026-07-25 |
| MAT·24 | Factorial explosion | Mathematics & Statistics | 6 | 5 | 2026-07-26 |
| MIL·23 | Fading advantage of a new weapon | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| FAM·14 | Fading attraction | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| ENG·17 | Fail-safe braking | Engineering & Technology | 6 | 3 | 2026-07-26 |
| CDA·91 | Failing fast | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| WRK·15 | Failure after repair | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| MAT·25 | Fair lottery over the integers | Mathematics & Statistics | 7 | 2 | 2026-07-26 |
| PHI·13 | Faith and evidence | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| GEO·17 | Fall-line cities | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| SPT·18 | Falling records | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| CDA·92 | False sharing | Computing, Data & AI | 6 | 2 | 2026-07-26 |
| AST·11 | False-color astronomical images | Astronomy & Space | 6 | 4 | 2026-07-27 |
| FAM·15 | Family estrangement | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| HIS·13 | Famine amid plenty | History, Society & Anthropology | 6 | 3 | 2026-07-26 |
| PHY·17 | Faraday cage | Physics | 7 | 3 | 2026-07-26 |
| ENV·15 | Farm nitrogen balance | Environment, Agriculture & Food | 6 | 6 | 2026-07-27 |
| ART·19 | Fashion churn | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| CHM·20 | Fast charging and battery life | Chemistry & Materials | 7 | 4 | 2026-07-27 |
| PHI·14 | Fasting | Philosophy, Ethics & Religion | 6 | 3 | 2026-07-26 |
| CDA·93 | Feature flags | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| CDA·94 | Federated data ownership | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| MED·21 | Fee-for-service payment | Health & Medicine | 6 | 5 | 2026-07-27 |
| ENG·18 | Feedback control | Engineering & Technology | 6 | 5 | 2026-07-26 |
| ART·20 | Feedback howl in live sound | Arts, Design & Culture | 7 | 4 | 2026-07-27 |
| EDU·14 | Feedback timing | Education & Learning | 6 | 4 | 2026-07-26 |
| MIL·24 | Feigned retreat | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| HIS·14 | Festival calendars | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| MED·22 | Fetal programming | Health & Medicine | 6 | 5 | 2026-07-27 |
| MED·23 | Fever | Health & Medicine | 3 | 3 | 2026-07-25 |
| CDA·95 | Few-shot prompting | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·96 | Fewer operations, slower program | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| PHY·18 | Feynman diagrams | Physics | 6 | 4 | 2026-07-27 |
| CHM·21 | Fibre strength and flaws | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| SPT·19 | Figure-skating spin | Sports, Exercise & Recreation | 5 | 3 | 2026-07-26 |
| CDA·97 | File deletion | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| LAN·17 | Filler words | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| CDA·98 | Finding without searching | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·99 | Fine-tuning versus retrieval | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| BIO·12 | Firefly synchrony | Biology & Ecology | 5 | 4 | 2026-07-27 |
| MED·24 | First-pass metabolism | Health & Medicine | 6 | 3 | 2026-07-26 |
| ENV·16 | Fish spoiling fast | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| ENV·17 | Fishery collapse | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| GOV·23 | Fixed-size legislature | Government, Law & Civics | 5 | 4 | 2026-07-27 |
| CHM·22 | Flame emission colours | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| HOM·17 | Flat-pack bracing | Home, Consumer & Everyday Life | 7 | 0 | 2026-07-26 |
| MIL·25 | Fleet in being | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| WRK·16 | Floating panels | Work, Careers & Skilled Trades | 6 | 0 | 2026-07-26 |
| CDA·100 | Floating-point error | Computing, Data & AI | 4 | 3 | 2026-07-25 |
| EAR·17 | Floodplain storage | Earth, Climate & Oceans | 6 | 5 | 2026-07-27 |
| EDU·15 | Fluency illusion | Education & Learning | 6 | 4 | 2026-07-26 |
| MIL·26 | Fog of war | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| ART·21 | Folk craft regionalism | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| ENV·18 | Food miles | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| ENV·19 | Food preservation | Environment, Agriculture & Food | 5 | 3 | 2026-07-26 |
| TRV·15 | Footfall wear on monuments | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-27 |
| SPT·20 | Forearm pump in climbing | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| EAR·18 | Forecast horizon | Earth, Climate & Oceans | 6 | 5 | 2026-07-26 |
| TRV·16 | Forecasting tonight's covers | Travel, Tourism & Hospitality | 6 | 5 | 2026-07-27 |
| BIO·13 | Forest height race | Biology & Ecology | 6 | 5 | 2026-07-26 |
| HIS·15 | Formulaic oral composition | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| CDA·101 | Foundation model economics | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| MED·25 | Fragmented prescribing | Health & Medicine | 7 | 5 | 2026-07-27 |
| LAN·18 | Framing | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| TRV·17 | Free upgrade cost | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-27 |
| PHI·15 | Free will | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| HOM·18 | Freezer burn | Home, Consumer & Everyday Life | 6 | 3 | 2026-07-26 |
| CHM·23 | Freezing-point depression | Chemistry & Materials | 5 | 3 | 2026-07-26 |
| TRV·18 | Frequent-flyer currency | Travel, Tourism & Hospitality | 7 | 4 | 2026-07-26 |
| HOM·19 | Full freezer efficiency | Home, Consumer & Everyday Life | 7 | 0 | 2026-07-26 |
| GEO·18 | Functional versus administrative regions | Geography & Regional Studies | 6 | 3 | 2026-07-26 |
| AST·12 | Galaxy rotation curves | Astronomy & Space | 6 | 4 | 2026-07-26 |
| ART·22 | Gamelan tuning | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| CDA·102 | Garbage collection pauses | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| MED·26 | General anaesthesia | Health & Medicine | 6 | 3 | 2026-07-26 |
| MAT·26 | Generating functions | Mathematics & Statistics | 7 | 5 | 2026-07-27 |
| ENG·19 | Generative design shapes | Engineering & Technology | 7 | 5 | 2026-07-27 |
| BIO·14 | Genetic drift | Biology & Ecology | 6 | 5 | 2026-07-27 |
| GEO·19 | Gentrification | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| EAR·19 | Geostrophic wind | Earth, Climate & Oceans | 6 | 5 | 2026-07-26 |
| HOM·20 | Ghost glow in LED bulbs | Home, Consumer & Everyday Life | 6 | 3 | 2026-07-26 |
| HIS·16 | Gift obligation | History, Society & Anthropology | 6 | 3 | 2026-07-26 |
| FAM·16 | Gift-exchange escalation | Family, Relationships & Human Development | 6 | 3 | 2026-07-27 |
| LAN·19 | Given-name fashions | Language, Media & Communication | 6 | 2 | 2026-07-26 |
| EAR·20 | Glacier flow | Earth, Climate & Oceans | 6 | 5 | 2026-07-26 |
| CHM·24 | Glass transition | Chemistry & Materials | 7 | 1 | 2026-07-26 |
| PHY·19 | Glass transparency | Physics | 3 | 2 | 2026-07-25 |
| SPT·21 | Golf ball dimples | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| CDA·103 | Grade earned, not declared | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| EDU·16 | Grade inflation | Education & Learning | 6 | 4 | 2026-07-26 |
| EDU·17 | Grade retention | Education & Learning | 7 | 3 | 2026-07-26 |
| HIS·17 | Grain and taxation | History, Society & Anthropology | 7 | 4 | 2026-07-26 |
| ENV·20 | Grain bin hot spots | Environment, Agriculture & Food | 6 | 3 | 2026-07-26 |
| LAN·20 | Grammatical evidentiality | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| FAM·17 | Grandmother proximity and fertility | Family, Relationships & Human Development | 7 | 3 | 2026-07-26 |
| FAM·18 | Grandparent asymmetry | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| AST·13 | Gravity assist | Astronomy & Space | 6 | 3 | 2026-07-26 |
| ENV·21 | Grazing and grassland richness | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| ENV·22 | Grazing rest period | Environment, Agriculture & Food | 6 | 3 | 2026-07-26 |
| ENG·20 | Green wave signal timing | Engineering & Technology | 6 | 3 | 2026-07-26 |
| ENG·21 | Grid balancing | Engineering & Technology | 6 | 5 | 2026-07-26 |
| ENG·22 | Grid inertia loss | Engineering & Technology | 7 | 0 | 2026-07-26 |
| FAM·19 | Grief timing | Family, Relationships & Human Development | 7 | 2 | 2026-07-26 |
| CDA·104 | Grokking in training | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| ART·23 | Groove and microtiming | Arts, Design & Culture | 6 | 5 | 2026-07-26 |
| TRV·19 | Ground delay programs | Travel, Tourism & Hospitality | 7 | 4 | 2026-07-26 |
| EDU·18 | Group projects | Education & Learning | 6 | 4 | 2026-07-26 |
| SPT·22 | Group-stage tiebreaks | Sports, Exercise & Recreation | 7 | 4 | 2026-07-26 |
| PHI·16 | Guaranteed secrecy | Philosophy, Ethics & Religion | 6 | 3 | 2026-07-26 |
| CDA·105 | Guardrails | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| TRV·20 | Guest-right | Travel, Tourism & Hospitality | 6 | 2 | 2026-07-26 |
| PHY·20 | Guided light | Physics | 6 | 5 | 2026-07-26 |
| ENG·23 | Guided light in fibre | Engineering & Technology | 7 | 4 | 2026-07-26 |
| BIO·15 | Gut colonization order | Biology & Ecology | 6 | 4 | 2026-07-26 |
| PHY·21 | Gyroscopic precession | Physics | 7 | 5 | 2026-07-26 |
| MIN·25 | Habit formation | Mind & Behavior | 6 | 4 | 2026-07-26 |
| MIN·26 | Habituation versus sensitization | Mind & Behavior | 6 | 5 | 2026-07-26 |
| MAT·27 | Hairy ball theorem | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| CDA·106 | Half-sorted is enough | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·107 | Halting problem | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| CDA·108 | Halving the haystack | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| MED·27 | Hand hygiene compliance | Health & Medicine | 7 | 2 | 2026-07-26 |
| SPT·23 | Handicapping | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| AST·14 | Hanging still versus racing around | Astronomy & Space | 6 | 4 | 2026-07-27 |
| CDA·109 | Hash table clustering | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| LAN·21 | Headlinese | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| SPT·24 | Heat acclimatization | Sports, Exercise & Recreation | 6 | 3 | 2026-07-26 |
| PHY·22 | Heat diffusion time | Physics | 6 | 3 | 2026-07-26 |
| ENG·24 | Heat exchanger fouling | Engineering & Technology | 6 | 2 | 2026-07-26 |
| ENG·25 | Heat pipes | Engineering & Technology | 6 | 3 | 2026-07-26 |
| MIN·27 | Hedonic adaptation | Mind & Behavior | 6 | 4 | 2026-07-26 |
| CHM·25 | Helium depletion | Chemistry & Materials | 6 | 4 | 2026-07-27 |
| PHY·23 | Helium voice | Physics | 6 | 4 | 2026-07-26 |
| HIS·18 | Herd dispersal among kin | History, Society & Anthropology | 6 | 3 | 2026-07-26 |
| MED·28 | Herd immunity | Health & Medicine | 5 | 4 | 2026-07-26 |
| HIS·19 | Hereditary succession | History, Society & Anthropology | 6 | 4 | 2026-07-27 |
| FAM·20 | Heritage language loss | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| CHM·26 | Hess's law | Chemistry & Materials | 6 | 5 | 2026-07-27 |
| BIO·16 | Hibernation | Biology & Ecology | 6 | 3 | 2026-07-26 |
| ENG·26 | High-voltage transmission | Engineering & Technology | 6 | 3 | 2026-07-26 |
| HIS·20 | Historical silence | History, Society & Anthropology | 5 | 4 | 2026-07-26 |
| MIL·27 | Holding a reserve | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| MIL·28 | Holding conquered ground | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| FAM·21 | Holiday time between two families | Family, Relationships & Human Development | 6 | 4 | 2026-07-27 |
| WRK·17 | Hollow section stiffness | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-27 |
| SPT·25 | Home advantage | Sports, Exercise & Recreation | 6 | 3 | 2026-07-26 |
| HOM·21 | Home insulation | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| BIO·17 | Honeybee waggle dance | Biology & Ecology | 6 | 5 | 2026-07-27 |
| TRV·21 | Honeypot sites | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-26 |
| ECO·28 | Hostage capital | Economics & Business | 7 | 3 | 2026-07-26 |
| CDA·110 | Hot partitions | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| PHY·24 | Hourglass flow rate | Physics | 7 | 3 | 2026-07-26 |
| HOM·22 | House dust | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| FAM·22 | Household money pots | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| ART·24 | How can music create emotion? | Arts, Design & Culture | 6 | 6 | 2026-07-25 |
| BIO·18 | How do birds know where to migrate? | Biology & Ecology | 7 | 5 | 2026-07-25 |
| CDA·111 | How does a neural network learn? | Computing, Data & AI | 7 | 7 | 2026-07-25 |
| ENG·27 | How does a refrigerator cool food? | Engineering & Technology | 6 | 5 | 2026-07-25 |
| MED·29 | How does antibiotic resistance develop? | Health & Medicine | 7 | 6 | 2026-07-25 |
| ENG·28 | How does GPS find your location? | Engineering & Technology | 7 | 7 | 2026-07-25 |
| CDA·112 | How encryption keeps messages secret | Computing, Data & AI | 7 | 6 | 2026-07-25 |
| HOM·23 | How much charge is left | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-27 |
| MED·30 | How vaccines work | Health & Medicine | 7 | 6 | 2026-07-25 |
| GEO·20 | Hub-and-feeder ports | Geography & Regional Studies | 6 | 4 | 2026-07-27 |
| TRV·22 | Hub-and-spoke routing | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-26 |
| EAR·21 | Hurricane intensification | Earth, Climate & Oceans | 6 | 5 | 2026-07-26 |
| CDA·113 | Hybrid search | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| ENV·23 | Hybrid seed decline | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| EAR·22 | Ice age triggers | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| EAR·23 | Ice core records | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| CDA·114 | Idempotent operations | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| PHI·17 | Identity over change | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| CDA·115 | Immutability | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| PHI·18 | Imperceptible harms | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| ECO·29 | Impossible trinity | Economics & Business | 6 | 5 | 2026-07-27 |
| MIN·28 | Inattentional blindness | Mind & Behavior | 6 | 4 | 2026-07-26 |
| MAT·28 | Incompleteness | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| ECO·30 | Incumbent disruption | Economics & Business | 7 | 5 | 2026-07-26 |
| CDA·116 | Indexing | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| LAN·22 | Indirect requests | Language, Media & Communication | 5 | 4 | 2026-07-26 |
| MED·31 | Individual treatment effect | Health & Medicine | 6 | 5 | 2026-07-27 |
| GEO·21 | Induced traffic | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| GEO·22 | Industrial district persistence | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| ECO·31 | Industry concentration | Economics & Business | 6 | 3 | 2026-07-26 |
| FAM·23 | Infant night waking | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| MAT·29 | Infinitude of primes | Mathematics & Statistics | 6 | 3 | 2026-07-26 |
| TRV·23 | Inflight taste | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| FAM·24 | Inherited parenting scripts | Family, Relationships & Human Development | 6 | 0 | 2026-07-26 |
| MAT·30 | Inspection paradox | Mathematics & Statistics | 6 | 5 | 2026-07-26 |
| CHM·27 | Instant glue | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| HOM·24 | Insurance | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| ECO·32 | Insurance pooling | Economics & Business | 6 | 4 | 2026-07-26 |
| ENG·29 | Integrator windup | Engineering & Technology | 7 | 2 | 2026-07-26 |
| EDU·19 | Interleaved practice | Education & Learning | 5 | 4 | 2026-07-26 |
| PHY·25 | Intermediate axis instability | Physics | 6 | 3 | 2026-07-26 |
| ECO·33 | Internal transfer pricing | Economics & Business | 6 | 2 | 2026-07-26 |
| CDA·117 | Internet packet routing | Computing, Data & AI | 4 | 4 | 2026-07-25 |
| MIN·29 | Interoception | Mind & Behavior | 7 | 5 | 2026-07-26 |
| SPT·26 | Interval training | Sports, Exercise & Recreation | 6 | 0 | 2026-07-26 |
| MED·32 | Intracranial pressure | Health & Medicine | 6 | 4 | 2026-07-27 |
| BIO·19 | Invasion lag before explosion | Biology & Ecology | 6 | 5 | 2026-07-27 |
| HIS·21 | Invented tradition | History, Society & Anthropology | 6 | 4 | 2026-07-27 |
| ENG·30 | Involute gear teeth | Engineering & Technology | 7 | 3 | 2026-07-26 |
| LAN·23 | Irregular verb survival | Language, Media & Communication | 7 | 0 | 2026-07-26 |
| PHY·26 | Irreversibility | Physics | 6 | 5 | 2026-07-26 |
| CHM·28 | Irreversible enzyme inhibition | Chemistry & Materials | 6 | 5 | 2026-07-27 |
| ENV·24 | Irrigation efficiency paradox | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| ENV·25 | Irrigation scheduling depth | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| BIO·20 | Island size rule | Biology & Ecology | 6 | 5 | 2026-07-26 |
| CDA·118 | Isolates, containers, and startup cost | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·119 | Isolation levels | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·120 | Isolation without a machine | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| CHM·29 | Isomer blindness in mass spectrometry | Chemistry & Materials | 6 | 5 | 2026-07-27 |
| EAR·24 | Isostatic rebound | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| CHM·30 | Isotopic provenance | Chemistry & Materials | 6 | 5 | 2026-07-27 |
| ECO·34 | J-curve after devaluation | Economics & Business | 6 | 5 | 2026-07-27 |
| BIO·21 | Janzen-Connell seedling mortality | Biology & Ecology | 6 | 4 | 2026-07-26 |
| ART·25 | Jazz improvisation | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| MED·33 | Jet lag | Health & Medicine | 5 | 3 | 2026-07-26 |
| SPT·27 | Judging order effects | Sports, Exercise & Recreation | 6 | 3 | 2026-07-26 |
| GOV·24 | Judicial recusal | Government, Law & Civics | 6 | 3 | 2026-07-26 |
| GOV·25 | Judicial review | Government, Law & Civics | 6 | 3 | 2026-07-26 |
| SPT·28 | Junior champions | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| GOV·26 | Jurisdictional forum shopping | Government, Law & Civics | 6 | 4 | 2026-07-27 |
| GOV·27 | Jury deliberation | Government, Law & Civics | 5 | 3 | 2026-07-26 |
| ECO·35 | Just-in-time fragility | Economics & Business | 7 | 4 | 2026-07-26 |
| MIN·30 | Just-noticeable difference | Mind & Behavior | 6 | 4 | 2026-07-26 |
| EAR·25 | Katabatic winds | Earth, Climate & Oceans | 6 | 3 | 2026-07-26 |
| PHI·19 | Keeping a rule against the case | Philosophy, Ethics & Religion | 7 | 4 | 2026-07-26 |
| CDA·121 | Keeping the history and the snapshot in one file | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| BIO·22 | Keystone species | Biology & Ecology | 6 | 4 | 2026-07-26 |
| CDA·122 | Killed with memory to spare | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| AST·15 | Kirkwood gaps | Astronomy & Space | 6 | 4 | 2026-07-26 |
| TRV·24 | Kitchen brigade stations | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-27 |
| SPT·29 | Knockout upsets | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| EDU·20 | Knowledge and comprehension | Education & Learning | 6 | 3 | 2026-07-26 |
| PHI·20 | Knowledge from testimony | Philosophy, Ethics & Religion | 6 | 5 | 2026-07-26 |
| CDA·123 | Labelling before deciding | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| AST·16 | Lagrange points | Astronomy & Space | 6 | 4 | 2026-07-26 |
| EAR·26 | Lake turnover | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| MIL·29 | Lanchester's square law | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-27 |
| BIO·23 | Land size limits | Biology & Ecology | 6 | 4 | 2026-07-26 |
| ENV·26 | Landfill methane | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| GEO·23 | Landlocked disadvantage | Geography & Regional Studies | 6 | 3 | 2026-07-26 |
| TRV·25 | Landmark restaurants | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| LAN·24 | Language abandonment | Language, Media & Communication | 6 | 5 | 2026-07-27 |
| AST·17 | Large mirror flexure | Astronomy & Space | 6 | 3 | 2026-07-26 |
| FAM·25 | Large-family parenting shift | Family, Relationships & Human Development | 6 | 3 | 2026-07-27 |
| PHY·27 | Laser coherence | Physics | 6 | 5 | 2026-07-26 |
| PHY·28 | Laser cooling | Physics | 6 | 3 | 2026-07-26 |
| HIS·22 | Late marriage and population restraint | History, Society & Anthropology | 7 | 2 | 2026-07-26 |
| CDA·124 | Late-arriving data | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| BIO·24 | Lateral inhibition in tissue | Biology & Ecology | 6 | 3 | 2026-07-26 |
| HOM·25 | Layered electrical protection | Home, Consumer & Everyday Life | 6 | 5 | 2026-07-27 |
| PHY·29 | Layered particle detectors | Physics | 6 | 7 | 2026-07-27 |
| CDA·125 | Layers are diffs | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| WRK·18 | Lead in short lengths | Work, Careers & Skilled Trades | 6 | 0 | 2026-07-26 |
| ENG·31 | Leak-before-break | Engineering & Technology | 6 | 3 | 2026-07-26 |
| AST·18 | Leap seconds | Astronomy & Space | 7 | 6 | 2026-07-27 |
| MIN·31 | Learned helplessness | Mind & Behavior | 6 | 3 | 2026-07-26 |
| WRK·19 | Learning a trade by standing there | Work, Careers & Skilled Trades | 6 | 3 | 2026-07-26 |
| EDU·21 | Learning by explaining | Education & Learning | 6 | 4 | 2026-07-26 |
| EDU·22 | Learning plateaus | Education & Learning | 6 | 4 | 2026-07-26 |
| CDA·126 | Least astonishment | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| HOM·26 | LED dimmer incompatibility | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| SPT·30 | Left-hander advantage | Sports, Exercise & Recreation | 6 | 2 | 2026-07-26 |
| HOM·27 | Leftover spoilage | Home, Consumer & Everyday Life | 5 | 4 | 2026-07-26 |
| GOV·28 | Legal precedent | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| BIO·25 | Leghemoglobin in root nodules | Biology & Ecology | 6 | 4 | 2026-07-26 |
| ART·26 | Legibility | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| TRV·26 | Length-of-stay controls | Travel, Tourism & Hospitality | 6 | 2 | 2026-07-26 |
| CDA·127 | Letting callers ask for exactly what they want | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| WRK·20 | Light-load diesel running | Work, Careers & Skilled Trades | 6 | 2 | 2026-07-26 |
| ENV·27 | Lime-induced nutrient lockup | Environment, Agriculture & Food | 6 | 3 | 2026-07-26 |
| HOM·28 | Limescale | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| HIS·23 | Liminality in initiation | History, Society & Anthropology | 6 | 3 | 2026-07-26 |
| WRK·21 | Limiting work in progress | Work, Careers & Skilled Trades | 6 | 2 | 2026-07-26 |
| MIN·32 | Limits of introspection | Mind & Behavior | 6 | 4 | 2026-07-27 |
| BIO·26 | Limits of regeneration | Biology & Ecology | 6 | 5 | 2026-07-26 |
| GOV·29 | Line of succession | Government, Law & Civics | 6 | 4 | 2026-07-27 |
| CDA·128 | Lineage | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| ART·27 | Linear perspective | Arts, Design & Culture | 5 | 3 | 2026-07-26 |
| CHM·31 | Liquid crystals | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| MIL·30 | Live-and-let-live truces | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-27 |
| PHI·21 | Living interpretation of a fixed text | Philosophy, Ethics & Religion | 6 | 5 | 2026-07-26 |
| LAN·25 | Loanword doublets | Language, Media & Communication | 6 | 3 | 2026-07-26 |
| MED·34 | Local anaesthetic failure | Health & Medicine | 6 | 4 | 2026-07-26 |
| ENV·28 | Locust upsurge | Environment, Agriculture & Food | 6 | 4 | 2026-07-27 |
| CDA·129 | Logged into someone else's account | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| WRK·22 | Long-hours arms race | Work, Careers & Skilled Trades | 6 | 2 | 2026-07-27 |
| MAT·31 | Long-run chain behaviour | Mathematics & Statistics | 6 | 5 | 2026-07-26 |
| GOV·30 | Loser-pays cost rules | Government, Law & Civics | 6 | 2 | 2026-07-26 |
| CDA·130 | Losing it or doing it twice | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·131 | Lossless compression | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| CDA·132 | Lost in the middle | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| AST·19 | Low-frequency radio cutoff | Astronomy & Space | 6 | 3 | 2026-07-26 |
| PHY·30 | Magnetic hysteresis | Physics | 6 | 7 | 2026-07-27 |
| SPT·31 | Magnus effect | Sports, Exercise & Recreation | 7 | 5 | 2026-07-26 |
| ENV·29 | Maillard browning | Environment, Agriculture & Food | 5 | 4 | 2026-07-26 |
| ENV·30 | Managed hives and wild pollinators | Environment, Agriculture & Food | 6 | 2 | 2026-07-26 |
| PHI·22 | Mandated rest days | Philosophy, Ethics & Religion | 7 | 3 | 2026-07-26 |
| CDA·133 | Many agents, one task | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| GEO·24 | Map projection distortion | Geography & Regional Studies | 5 | 4 | 2026-07-26 |
| GEO·25 | Mapping an outbreak's source | Geography & Regional Studies | 6 | 3 | 2026-07-27 |
| ART·28 | Marble supports | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| EAR·27 | Marine reservoir age | Earth, Climate & Oceans | 6 | 1 | 2026-07-26 |
| MIL·31 | Maritime chokepoints | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-26 |
| BIO·27 | Mark-recapture estimates | Biology & Ecology | 6 | 5 | 2026-07-27 |
| EDU·23 | Marker disagreement | Education & Learning | 6 | 4 | 2026-07-26 |
| GEO·26 | Market day rotation | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| HIS·24 | Marrying outside the group | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| AST·20 | Martian atmosphere loss | Astronomy & Space | 6 | 3 | 2026-07-26 |
| GEO·27 | Mass elevation effect | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| ART·29 | Massed string sound | Arts, Design & Culture | 6 | 3 | 2026-07-26 |
| BIO·28 | Mast seeding | Biology & Ecology | 6 | 5 | 2026-07-26 |
| WRK·23 | Master keying | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| MAT·32 | Maximum flow and minimum cut | Mathematics & Statistics | 6 | 4 | 2026-07-27 |
| PHY·31 | Maxwell's demon | Physics | 6 | 3 | 2026-07-26 |
| ENG·32 | Measurement dead time | Engineering & Technology | 6 | 2 | 2026-07-26 |
| HIS·25 | Measurement standardization | History, Society & Anthropology | 5 | 2 | 2026-07-26 |
| ENG·33 | Mechanical advantage | Engineering & Technology | 6 | 5 | 2026-07-26 |
| LAN·26 | Media sameness | Language, Media & Communication | 6 | 3 | 2026-07-26 |
| CDA·134 | Memory fragmentation | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| MIN·33 | Memory reconstruction | Mind & Behavior | 5 | 4 | 2026-07-26 |
| CDA·135 | Memory thrashing | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| ECO·36 | Mental accounting | Economics & Business | 5 | 3 | 2026-07-26 |
| CDA·136 | Merge conflicts | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| FAM·26 | Merged kinship terms | Family, Relationships & Human Development | 7 | 5 | 2026-07-26 |
| CDA·137 | Merging often | Computing, Data & AI | 6 | 2 | 2026-07-26 |
| BIO·29 | Metabolic scaling | Biology & Ecology | 6 | 4 | 2026-07-26 |
| BIO·30 | Metabolic water in desert rodents | Biology & Ecology | 6 | 4 | 2026-07-27 |
| LAN·27 | Metaphor | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| MED·35 | Metastasis | Health & Medicine | 6 | 4 | 2026-07-26 |
| AST·21 | Meteor streaks | Astronomy & Space | 6 | 4 | 2026-07-26 |
| CDA·138 | Metered cost | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·139 | Metric cardinality explosion | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| ART·30 | Metrical verse | Arts, Design & Culture | 6 | 3 | 2026-07-26 |
| ART·31 | Microphone proximity effect | Arts, Design & Culture | 7 | 3 | 2026-07-26 |
| ENV·31 | Mid-season yield forecasting | Environment, Agriculture & Food | 6 | 5 | 2026-07-27 |
| BIO·31 | Midday stomatal closure | Biology & Ecology | 6 | 5 | 2026-07-26 |
| MIL·32 | Military logistics | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| ENV·32 | Milk spoilage after opening | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| MIL·33 | Mine warfare | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| HOM·29 | Minimum payment trap | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-27 |
| MIN·34 | Minority influence | Mind & Behavior | 6 | 4 | 2026-07-26 |
| WRK·24 | Misleading fault codes | Work, Careers & Skilled Trades | 6 | 2 | 2026-07-26 |
| TRV·27 | Missed connections | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-26 |
| MIL·34 | Mission command | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-26 |
| TRV·28 | Mixed-speed rail capacity | Travel, Tourism & Hospitality | 6 | 2 | 2026-07-26 |
| CDA·140 | Model collapse | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| CDA·141 | Model drift | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| CDA·142 | Model quantization | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·143 | Model routing | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| GEO·28 | Modifiable areal units | Geography & Regional Studies | 6 | 3 | 2026-07-26 |
| CHM·32 | Molecular handedness | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| ENV·33 | Monoculture fragility | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| EAR·28 | Monsoon | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| MAT·33 | Monty Hall problem | Mathematics & Statistics | 6 | 2 | 2026-07-26 |
| AST·22 | Moon illusion | Astronomy & Space | 7 | 3 | 2026-07-26 |
| PHI·23 | Moral luck | Philosophy, Ethics & Religion | 5 | 3 | 2026-07-26 |
| BIO·32 | Morphogen gradients | Biology & Ecology | 7 | 3 | 2026-07-26 |
| MIN·35 | Motion sickness | Mind & Behavior | 6 | 4 | 2026-07-26 |
| GEO·29 | Mountain language diversity | Geography & Regional Studies | 6 | 3 | 2026-07-26 |
| WRK·25 | Movement joints in tiling | Work, Careers & Skilled Trades | 6 | 2 | 2026-07-26 |
| CDA·144 | Moving failure handling out of the program | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| CDA·145 | Multimodal fusion | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| WRK·26 | Multiple lock isolation | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-27 |
| PHI·24 | Multiple realizability of mind | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-27 |
| MIL·35 | Munitions stockpiles | Military, Conflict & Strategic Studies | 7 | 3 | 2026-07-26 |
| SPT·32 | Muscle cramp | Sports, Exercise & Recreation | 7 | 4 | 2026-07-26 |
| ART·32 | Museum lighting | Arts, Design & Culture | 7 | 3 | 2026-07-26 |
| ART·33 | Musical consonance | Arts, Design & Culture | 5 | 3 | 2026-07-26 |
| BIO·33 | Mycorrhizal carbon trade | Biology & Ecology | 6 | 3 | 2026-07-26 |
| MIN·36 | Nap length | Mind & Behavior | 6 | 3 | 2026-07-26 |
| WRK·27 | Natural bed in stone | Work, Careers & Skilled Trades | 7 | 3 | 2026-07-26 |
| WRK·28 | Near misses | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| CDA·146 | Nearest first | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| MAT·34 | Negative edge weights | Mathematics & Statistics | 7 | 2 | 2026-07-26 |
| ECO·37 | Network effects | Economics & Business | 6 | 5 | 2026-07-26 |
| PHY·32 | Neutrino detection | Physics | 6 | 2 | 2026-07-26 |
| HIS·26 | New crops and population growth | History, Society & Anthropology | 7 | 4 | 2026-07-26 |
| MAT·35 | Newton's method | Mathematics & Statistics | 6 | 4 | 2026-07-27 |
| CDA·147 | Next-token prediction | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| PHY·33 | Night window reflections | Physics | 6 | 4 | 2026-07-26 |
| HOM·30 | Night-time alarm chirp | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| LAN·28 | Nighttime radio reach | Language, Media & Communication | 7 | 0 | 2026-07-26 |
| AST·23 | Nobody may own the Moon | Astronomy & Space | 6 | 4 | 2026-07-27 |
| ENG·34 | Non-bypassable safety interlocks | Engineering & Technology | 7 | 4 | 2026-07-27 |
| PHI·25 | Non-identity problem | Philosophy, Ethics & Religion | 6 | 3 | 2026-07-26 |
| EDU·24 | Non-negotiable deadlines | Education & Learning | 7 | 3 | 2026-07-27 |
| CDA·148 | Normalization | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| HOM·31 | Nose blindness | Home, Consumer & Everyday Life | 6 | 5 | 2026-07-27 |
| EDU·25 | Note-taking by hand | Education & Learning | 6 | 4 | 2026-07-26 |
| GOV·31 | Notice-and-comment rulemaking | Government, Law & Civics | 6 | 3 | 2026-07-26 |
| PHY·34 | Nuclear binding energy | Physics | 6 | 5 | 2026-07-26 |
| MED·36 | Number needed to treat | Health & Medicine | 6 | 3 | 2026-07-26 |
| CDA·149 | Objects that do not know they are stored | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| MIL·36 | Obsolete fortifications | Military, Conflict & Strategic Studies | 7 | 4 | 2026-07-26 |
| WRK·29 | Occupational licensing | Work, Careers & Skilled Trades | 6 | 3 | 2026-07-26 |
| EAR·29 | Ocean acidification | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| EAR·30 | Ocean circulation | Earth, Climate & Oceans | 5 | 4 | 2026-07-26 |
| BIO·34 | Ocean productivity | Biology & Ecology | 6 | 5 | 2026-07-26 |
| ENG·35 | Oil film in bearings | Engineering & Technology | 6 | 5 | 2026-07-26 |
| CDA·150 | One improbable word | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| WRK·30 | One-task subcontractor | Work, Careers & Skilled Trades | 5 | 4 | 2026-07-27 |
| CDA·151 | Opaque cursors | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| GOV·32 | Open government records | Government, Law & Civics | 7 | 0 | 2026-07-26 |
| MED·37 | Opioid-induced hyperalgesia | Health & Medicine | 7 | 0 | 2026-07-26 |
| PHY·35 | Optical pyrometry | Physics | 6 | 7 | 2026-07-27 |
| ART·34 | Optical sizes in type | Arts, Design & Culture | 6 | 3 | 2026-07-26 |
| MAT·36 | Optimal stopping | Mathematics & Statistics | 6 | 3 | 2026-07-26 |
| HIS·27 | Oral tradition | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| AST·24 | Orbital debris cascade | Astronomy & Space | 7 | 3 | 2026-07-26 |
| AST·25 | Orbital drag speed-up | Astronomy & Space | 6 | 4 | 2026-07-26 |
| AST·26 | Orbital rendezvous | Astronomy & Space | 6 | 4 | 2026-07-26 |
| CDA·152 | Orchestration | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·153 | Order from pairwise rules | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·154 | Order within a slice | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| MED·38 | Organ allocation matching | Health & Medicine | 6 | 4 | 2026-07-26 |
| HIS·28 | Origin of money | History, Society & Anthropology | 6 | 5 | 2026-07-26 |
| HIS·29 | Origin of the state | History, Society & Anthropology | 5 | 3 | 2026-07-26 |
| BIO·35 | Original antigenic sin | Biology & Ecology | 7 | 3 | 2026-07-26 |
| CHM·33 | Oscillating chemical reactions | Chemistry & Materials | 6 | 4 | 2026-07-27 |
| CDA·155 | Output as untrusted input | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| TRV·29 | Overbooking | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| FAM·27 | Overclaimed housework | Family, Relationships & Human Development | 6 | 4 | 2026-07-27 |
| MAT·37 | Overdetermined measurements | Mathematics & Statistics | 6 | 4 | 2026-07-27 |
| MED·39 | Overdiagnosis | Health & Medicine | 6 | 4 | 2026-07-26 |
| CDA·156 | Overfitting | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| FAM·28 | Overheard speech and vocabulary | Family, Relationships & Human Development | 7 | 2 | 2026-07-26 |
| ECO·38 | Overnight repo lending | Economics & Business | 7 | 3 | 2026-07-26 |
| TRV·30 | Overtourism | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| SPT·33 | Overtraining | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| TRV·31 | Package tour pricing | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-26 |
| MED·40 | Paediatric dosing | Health & Medicine | 7 | 4 | 2026-07-27 |
| ECO·39 | Pallet size lock-in | Economics & Business | 6 | 5 | 2026-07-27 |
| HOM·32 | Pantry moth persistence | Home, Consumer & Everyday Life | 7 | 4 | 2026-07-26 |
| CHM·34 | Paper chromatography | Chemistry & Materials | 6 | 3 | 2026-07-26 |
| MAT·38 | Paper folding limit | Mathematics & Statistics | 6 | 3 | 2026-07-26 |
| PHI·26 | Paradox of tolerance | Philosophy, Ethics & Religion | 6 | 2 | 2026-07-26 |
| ECO·40 | Paradox of value | Economics & Business | 6 | 3 | 2026-07-26 |
| BIO·36 | Parasite host manipulation | Biology & Ecology | 6 | 4 | 2026-07-26 |
| MIN·37 | Pareidolia | Mind & Behavior | 6 | 4 | 2026-07-26 |
| SPT·34 | Parkrun spread | Sports, Exercise & Recreation | 6 | 4 | 2026-07-27 |
| CDA·157 | Partition pruning | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| PHI·27 | Pascal's mugging | Philosophy, Ethics & Religion | 6 | 3 | 2026-07-27 |
| CHM·35 | Passivation | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| ENV·34 | Pasteurised mushroom substrate | Environment, Agriculture & Food | 7 | 5 | 2026-07-26 |
| ENV·35 | Pathogen testing limits | Environment, Agriculture & Food | 6 | 4 | 2026-07-27 |
| ART·35 | Patina and age value | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| EAR·31 | Patterned ground | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| WRK·31 | Pay rises by leaving | Work, Careers & Skilled Trades | 6 | 0 | 2026-07-26 |
| WRK·32 | Paying above the market | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| WRK·33 | Paying for the five-minute fix | Work, Careers & Skilled Trades | 6 | 3 | 2026-07-26 |
| EDU·26 | Paying pupils to read | Education & Learning | 6 | 3 | 2026-07-26 |
| MIL·37 | Peace negotiation | Military, Conflict & Strategic Studies | 5 | 3 | 2026-07-26 |
| MIL·38 | Peacekeeping mandates | Military, Conflict & Strategic Studies | 7 | 4 | 2026-07-26 |
| BIO·37 | Peat accumulation | Biology & Ecology | 6 | 5 | 2026-07-27 |
| FAM·29 | Pedigree collapse | Family, Relationships & Human Development | 6 | 4 | 2026-07-27 |
| SPT·35 | Penalty aiming | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| CHM·36 | Perceived coldness of metals | Chemistry & Materials | 6 | 4 | 2026-07-27 |
| GOV·33 | Perceived crime trends | Government, Law & Civics | 6 | 4 | 2026-07-27 |
| SPT·36 | Perceived exertion | Sports, Exercise & Recreation | 6 | 4 | 2026-07-27 |
| ENG·36 | Perceived lift waiting time | Engineering & Technology | 6 | 3 | 2026-07-27 |
| MIN·38 | Perceptual load and distraction | Mind & Behavior | 6 | 4 | 2026-07-27 |
| MAT·39 | Percolation threshold | Mathematics & Statistics | 6 | 4 | 2026-07-27 |
| CDA·158 | Permission-aware retrieval | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| LAN·29 | Persistence of misinformation | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| GEO·30 | Persistent poor neighbourhoods | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| GOV·34 | Persistent rules | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| ENV·36 | Pest resurgence | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| MED·41 | Phantom limb pain | Health & Medicine | 4 | 3 | 2026-07-25 |
| GEO·31 | Phantom traffic jams | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| ART·36 | Photographic evidence | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| AST·27 | Photon escape time | Astronomy & Space | 6 | 4 | 2026-07-26 |
| BIO·38 | Photosynthesis | Biology & Ecology | 6 | 5 | 2026-07-26 |
| CHM·37 | Physical ageing of plastics | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| MED·42 | Physiological reserve | Health & Medicine | 6 | 0 | 2026-07-26 |
| MAT·40 | Pigeonhole principle | Mathematics & Statistics | 6 | 3 | 2026-07-26 |
| EDU·27 | Pilot-to-scale failure | Education & Learning | 6 | 3 | 2026-07-26 |
| GEO·32 | Pingo growth | Geography & Regional Studies | 7 | 4 | 2026-07-26 |
| MED·43 | Pins and needles | Health & Medicine | 6 | 5 | 2026-07-26 |
| BIO·39 | Pit viper infrared sensing | Biology & Ecology | 6 | 3 | 2026-07-26 |
| GEO·33 | Place names | Geography & Regional Studies | 6 | 5 | 2026-07-26 |
| MED·44 | Placebo effect | Health & Medicine | 5 | 4 | 2026-07-26 |
| AST·28 | Planetary rings | Astronomy & Space | 5 | 4 | 2026-07-26 |
| WRK·34 | Planning fallacy | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| CDA·159 | Planting the source it will cite | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| BIO·40 | Plasmid addiction systems | Biology & Ecology | 6 | 5 | 2026-07-27 |
| WRK·35 | Plaster in thin coats | Work, Careers & Skilled Trades | 7 | 0 | 2026-07-26 |
| CHM·38 | Plastic weathering | Chemistry & Materials | 6 | 3 | 2026-07-26 |
| ART·37 | Played-in instruments | Arts, Design & Culture | 6 | 4 | 2026-07-27 |
| SPT·37 | Playoff series length | Sports, Exercise & Recreation | 6 | 5 | 2026-07-27 |
| GOV·35 | Plea bargaining | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| AST·29 | Pluto's seasonal atmosphere | Astronomy & Space | 6 | 5 | 2026-07-26 |
| CDA·160 | Point-in-time joins | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·161 | Poison messages | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| CDA·162 | Poisoning the well | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| EAR·32 | Polar amplification | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| SPT·38 | Pole vault energy transfer | Sports, Exercise & Recreation | 6 | 5 | 2026-07-27 |
| BIO·41 | Pollination specificity | Biology & Ecology | 5 | 4 | 2026-07-26 |
| TRV·32 | Poolside sunbed race | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-27 |
| HIS·30 | Post-plague wages | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| FAM·30 | Post-reproductive life | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| MIN·39 | Practice feedback | Mind & Behavior | 7 | 5 | 2026-07-26 |
| MAT·41 | Pre-registered analysis | Mathematics & Statistics | 6 | 4 | 2026-07-27 |
| CDA·163 | Prefill and decode | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| MED·45 | Pregnancy immune tolerance | Health & Medicine | 6 | 4 | 2026-07-26 |
| EDU·28 | Prerequisite chains | Education & Learning | 7 | 3 | 2026-07-26 |
| HIS·31 | Preservation bias | History, Society & Anthropology | 6 | 2 | 2026-07-26 |
| GOV·36 | Presumption of innocence | Government, Law & Civics | 6 | 5 | 2026-07-26 |
| WRK·36 | Preventive replacement | Work, Careers & Skilled Trades | 6 | 3 | 2026-07-26 |
| ECO·41 | Price signals | Economics & Business | 6 | 4 | 2026-07-26 |
| PHI·28 | Pricing the sacred | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| GEO·34 | Primate cities | Geography & Regional Studies | 6 | 3 | 2026-07-26 |
| PHI·29 | Problem of evil | Philosophy, Ethics & Religion | 7 | 1 | 2026-07-26 |
| PHI·30 | Problem of induction | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| EDU·29 | Productive failure | Education & Learning | 6 | 4 | 2026-07-27 |
| ECO·42 | Profit versus cash | Economics & Business | 6 | 4 | 2026-07-26 |
| BIO·42 | Programmed cell death | Biology & Ecology | 6 | 4 | 2026-07-26 |
| CDA·164 | Progress-bar estimates | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| PHI·31 | Prohibition of images | Philosophy, Ethics & Religion | 6 | 5 | 2026-07-26 |
| PHI·32 | Promising | Philosophy, Ethics & Religion | 6 | 3 | 2026-07-26 |
| WRK·37 | Promotion mismatch | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| CDA·165 | Prompt chaining | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| CDA·166 | Prompt injection | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| CDA·167 | Prompt sensitivity | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| MIN·40 | Prospective memory | Mind & Behavior | 6 | 5 | 2026-07-26 |
| CHM·39 | Protein assay adulteration | Chemistry & Materials | 6 | 4 | 2026-07-27 |
| CDA·168 | Protocol errors versus execution errors | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·169 | Provenance of what you deploy | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·170 | Proving you started the exchange you are finishing | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| FAM·31 | Proxy arguments | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| CDA·171 | Pseudorandomness | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| AST·30 | Pulsar spin rates | Astronomy & Space | 7 | 4 | 2026-07-26 |
| HIS·32 | Putting-out system | History, Society & Anthropology | 6 | 4 | 2026-07-27 |
| PHY·36 | Quantum error correction | Physics | 6 | 7 | 2026-07-27 |
| HIS·33 | Quarantine institutions | History, Society & Anthropology | 6 | 4 | 2026-07-27 |
| CDA·172 | Query plan estimation | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| BIO·43 | Quorum sensing | Biology & Ecology | 6 | 4 | 2026-07-26 |
| CDA·173 | Quorums | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| WRK·38 | Quoting a job | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| ENV·37 | Race to fish under quota | Environment, Agriculture & Food | 7 | 5 | 2026-07-26 |
| HOM·33 | Radiant chill indoors | Home, Consumer & Everyday Life | 6 | 2 | 2026-07-26 |
| EAR·33 | Radiation frost | Earth, Climate & Oceans | 6 | 5 | 2026-07-26 |
| AST·31 | Radiation-hardened spacecraft computers | Astronomy & Space | 7 | 5 | 2026-07-26 |
| ENG·37 | Radio diffraction | Engineering & Technology | 6 | 5 | 2026-07-26 |
| AST·32 | Radio interferometry | Astronomy & Space | 6 | 4 | 2026-07-26 |
| AST·33 | Radio spectrum crowding of the sky | Astronomy & Space | 6 | 4 | 2026-07-27 |
| PHY·37 | Radioactive half-life | Physics | 6 | 4 | 2026-07-26 |
| HIS·34 | Radiocarbon calibration plateaus | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| EAR·34 | Rain shadow | Earth, Climate & Oceans | 6 | 5 | 2026-07-26 |
| EAR·35 | Rainfall isotope distillation | Earth, Climate & Oceans | 7 | 4 | 2026-07-26 |
| GOV·37 | Random audits | Government, Law & Civics | 7 | 2 | 2026-07-26 |
| MAT·42 | Random walk recurrence | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| TRV·33 | Randomized screening | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| MED·46 | Randomized trials | Health & Medicine | 6 | 4 | 2026-07-26 |
| CDA·174 | Rapidly changing attributes | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| LAN·30 | Rare words in corpora | Language, Media & Communication | 6 | 0 | 2026-07-26 |
| CDA·175 | Rate limiting | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| CDA·176 | Re-identification of anonymized data | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| EDU·30 | Reading acquisition | Education & Learning | 6 | 6 | 2026-07-26 |
| ART·38 | Reciprocity failure | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| CDA·177 | Recommendation narrowing | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·178 | Recording a change without losing the present | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| CDA·179 | Recovering a schedule nobody wrote down | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·180 | Recovering what the business meant | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·181 | Recovery objectives | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| HOM·34 | Recycling contamination | Home, Consumer & Everyday Life | 6 | 5 | 2026-07-27 |
| PHY·38 | Redefining the kilogram | Physics | 7 | 7 | 2026-07-27 |
| BIO·44 | Redox banding in sediment | Biology & Ecology | 6 | 3 | 2026-07-26 |
| LAN·31 | Redundancy of written text | Language, Media & Communication | 6 | 5 | 2026-07-27 |
| SPT·39 | Redundant climbing anchors | Sports, Exercise & Recreation | 6 | 4 | 2026-07-27 |
| AST·34 | Reentry heating | Astronomy & Space | 7 | 4 | 2026-07-26 |
| MED·47 | Referred pain | Health & Medicine | 6 | 5 | 2026-07-26 |
| CDA·182 | Refinement stages | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| PHI·33 | Reflective equilibrium | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-27 |
| CHM·40 | Refrigerant changeover | Chemistry & Materials | 7 | 4 | 2026-07-27 |
| GEO·35 | Regional incentive bidding | Geography & Regional Studies | 6 | 4 | 2026-07-27 |
| MAT·43 | Regression to the mean | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| GOV·38 | Regulatory capture | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| GOV·39 | Regulatory grandfathering | Government, Law & Civics | 6 | 0 | 2026-07-26 |
| GOV·40 | Regulatory ossification | Government, Law & Civics | 6 | 2 | 2026-07-26 |
| ENG·38 | Reinforced concrete | Engineering & Technology | 5 | 4 | 2026-07-26 |
| SPT·40 | Relative age effect | Sports, Exercise & Recreation | 6 | 3 | 2026-07-26 |
| CDA·183 | Releasing to a few first | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| TRV·34 | Remembered holidays | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| CDA·184 | Remembering the sub-answers | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| FAM·32 | Reminiscence bump | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| FAM·33 | Remittances and the children left behind | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| HOM·35 | Repair economics | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| CDA·185 | Replacing a system you cannot turn off | Computing, Data & AI | 7 | 6 | 2026-07-26 |
| CDA·186 | Replay determinism | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| CDA·187 | Replication lag | Computing, Data & AI | 7 | 6 | 2026-07-26 |
| CDA·188 | Requests you did not make | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| EAR·36 | Reservoir operating dilemma | Earth, Climate & Oceans | 7 | 5 | 2026-07-27 |
| PHY·39 | Resonance | Physics | 5 | 3 | 2026-07-26 |
| GOV·41 | Resource revenue and accountability | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| TRV·35 | Restaurant districts | Travel, Tourism & Hospitality | 7 | 3 | 2026-07-27 |
| ECO·43 | Retail clustering | Economics & Business | 6 | 4 | 2026-07-26 |
| ECO·44 | Retail seasonality | Economics & Business | 6 | 4 | 2026-07-27 |
| WRK·39 | Retention money | Work, Careers & Skilled Trades | 7 | 3 | 2026-07-27 |
| EDU·31 | Retrieval practice | Education & Learning | 5 | 4 | 2026-07-26 |
| CDA·189 | Retrieval-augmented generation | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·190 | Retry storms | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| SPT·41 | Return-to-play decision | Sports, Exercise & Recreation | 6 | 5 | 2026-07-27 |
| TRV·36 | Return-trip effect | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-26 |
| HOM·36 | Review polarization | Home, Consumer & Everyday Life | 6 | 0 | 2026-07-26 |
| HIS·35 | Revolution timing | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| HOM·37 | Rice cooker cutoff | Home, Consumer & Everyday Life | 6 | 0 | 2026-07-26 |
| ENV·38 | Ripening by contagion | Environment, Agriculture & Food | 5 | 5 | 2026-07-26 |
| PHI·34 | Ritual legal fictions | Philosophy, Ethics & Religion | 7 | 4 | 2026-07-26 |
| PHI·35 | Ritual meaning | Philosophy, Ethics & Religion | 5 | 3 | 2026-07-26 |
| PHI·36 | Ritual purity and contagion | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-27 |
| GEO·36 | River boundaries that shift | Geography & Regional Studies | 7 | 4 | 2026-07-26 |
| GEO·37 | River capture | Geography & Regional Studies | 6 | 5 | 2026-07-26 |
| EAR·37 | River meanders | Earth, Climate & Oceans | 4 | 4 | 2026-07-25 |
| GEO·38 | River name survival | Geography & Regional Studies | 7 | 0 | 2026-07-26 |
| ENG·39 | Road cracking | Engineering & Technology | 6 | 5 | 2026-07-26 |
| AST·35 | Rocket staging | Astronomy & Space | 6 | 4 | 2026-07-26 |
| EAR·38 | Rogue waves | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| CDA·191 | Roles as compression | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| HOM·38 | Rolling boil versus simmer | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| TRV·37 | Room turnover window | Travel, Tourism & Hospitality | 6 | 0 | 2026-07-26 |
| EAR·39 | Rotation and storm size | Earth, Climate & Oceans | 6 | 4 | 2026-07-27 |
| WRK·40 | Rough-in inspection | Work, Careers & Skilled Trades | 6 | 3 | 2026-07-26 |
| MIL·39 | Rout | Military, Conflict & Strategic Studies | 6 | 0 | 2026-07-26 |
| TRV·38 | Route survival after downturns | Travel, Tourism & Hospitality | 6 | 3 | 2026-07-27 |
| PHI·37 | Routinization of charisma | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-27 |
| SPT·42 | Rowing crew scale | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| ART·39 | Rubato's borrowed time | Arts, Design & Culture | 6 | 4 | 2026-07-27 |
| CHM·41 | Rubber elasticity | Chemistry & Materials | 6 | 5 | 2026-07-26 |
| CDA·192 | Rubber-stamped review | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| WRK·41 | Rules of thumb on site | Work, Careers & Skilled Trades | 6 | 3 | 2026-07-26 |
| LAN·32 | Rumour sharpening | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| AST·36 | Runaway planetesimal growth | Astronomy & Space | 6 | 4 | 2026-07-27 |
| CDA·193 | Running both and comparing | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| WRK·42 | Running-in wear | Work, Careers & Skilled Trades | 6 | 3 | 2026-07-27 |
| ENV·39 | Runoff from dry ground | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| GEO·39 | Rural depopulation | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| CHM·42 | Sacrificial anodes | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| ECO·45 | Safety stock | Economics & Business | 6 | 5 | 2026-07-26 |
| CDA·194 | Sagas | Computing, Data & AI | 6 | 1 | 2026-07-26 |
| SPT·43 | Sailing upwind | Sports, Exercise & Recreation | 6 | 3 | 2026-07-26 |
| SPT·44 | Salary cap | Sports, Exercise & Recreation | 6 | 6 | 2026-07-27 |
| ENV·40 | Salinization | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| EAR·40 | Salt marsh accretion | Earth, Climate & Oceans | 7 | 4 | 2026-07-27 |
| HIS·36 | Salt trade routes | History, Society & Anthropology | 6 | 4 | 2026-07-27 |
| MAT·44 | Sample size versus population | Mathematics & Statistics | 6 | 5 | 2026-07-26 |
| FAM·34 | Sandwich-generation overlap | Family, Relationships & Human Development | 6 | 3 | 2026-07-27 |
| HOM·39 | Savings commitment devices | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-27 |
| WRK·43 | Scaffold ties | Work, Careers & Skilled Trades | 6 | 0 | 2026-07-26 |
| ENV·41 | Scaling a recipe up | Environment, Agriculture & Food | 6 | 4 | 2026-07-27 |
| CDA·195 | Scaling that overshoots | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| HIS·37 | Scattered strip farming | History, Society & Anthropology | 6 | 3 | 2026-07-26 |
| TRV·39 | Schedule padding | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| EDU·32 | School catchment price premium | Education & Learning | 6 | 3 | 2026-07-27 |
| PHI·38 | Scientific testability | Philosophy, Ethics & Religion | 5 | 4 | 2026-07-26 |
| MED·48 | Screening false positives | Health & Medicine | 6 | 5 | 2026-07-26 |
| HOM·40 | Screws in end grain | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| HIS·38 | Scribal abbreviation | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| EAR·41 | Sea breeze reversal | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| EAR·42 | Sea level fingerprints | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| EAR·43 | Sea saltiness | Earth, Climate & Oceans | 6 | 5 | 2026-07-26 |
| EAR·44 | Sea-ice brine rejection | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| CDA·196 | Search indexing | Computing, Data & AI | 6 | 7 | 2026-07-26 |
| HIS·39 | Seasonal labour budget | History, Society & Anthropology | 6 | 4 | 2026-07-27 |
| AST·37 | Seasons | Astronomy & Space | 5 | 4 | 2026-07-26 |
| EDU·33 | Seating arrangement and discussion | Education & Learning | 7 | 3 | 2026-07-27 |
| TRV·40 | Seating by the window | Travel, Tourism & Hospitality | 7 | 3 | 2026-07-26 |
| HIS·40 | Second serfdom | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| FAM·35 | Second-earner insurance | Family, Relationships & Human Development | 6 | 3 | 2026-07-27 |
| HOM·41 | Second-hand going rate | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-27 |
| GOV·42 | Secret ballot | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| MIL·40 | Security dilemma | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| ENV·42 | Seed vigour versus germination | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| EAR·45 | Seismic shadow zone | Earth, Climate & Oceans | 6 | 2 | 2026-07-26 |
| HIS·41 | Selection by lot | History, Society & Anthropology | 6 | 5 | 2026-07-27 |
| PHY·40 | Selective heating | Physics | 6 | 5 | 2026-07-26 |
| CDA·197 | Self-consistency | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| PHI·39 | Self-defeating aims | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| CHM·43 | Self-healing coatings | Chemistry & Materials | 7 | 4 | 2026-07-26 |
| PHI·40 | Self-refuting claims | Philosophy, Ethics & Religion | 7 | 1 | 2026-07-26 |
| MIN·41 | Self-tickling | Mind & Behavior | 6 | 4 | 2026-07-26 |
| MIN·42 | Semantic satiation | Mind & Behavior | 6 | 4 | 2026-07-26 |
| CHM·44 | Semiconductor doping | Chemistry & Materials | 6 | 3 | 2026-07-26 |
| BIO·45 | Senescence | Biology & Ecology | 6 | 5 | 2026-07-26 |
| MIN·43 | Sense of time | Mind & Behavior | 3 | 3 | 2026-07-25 |
| CDA·198 | Separating the read model from the write model | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| MED·49 | Sepsis | Health & Medicine | 6 | 4 | 2026-07-26 |
| CHM·45 | Serial dilution limit | Chemistry & Materials | 6 | 4 | 2026-07-27 |
| ENG·40 | Series reliability of many parts | Engineering & Technology | 6 | 4 | 2026-07-27 |
| CDA·199 | Service discovery | Computing, Data & AI | 6 | 2 | 2026-07-26 |
| HOM·42 | Setting a stain | Home, Consumer & Everyday Life | 7 | 4 | 2026-07-26 |
| WRK·44 | Setting blocks | Work, Careers & Skilled Trades | 7 | 3 | 2026-07-26 |
| CHM·46 | Shape-memory alloys | Chemistry & Materials | 6 | 5 | 2026-07-26 |
| CDA·200 | Sharding | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| FAM·36 | Shared memory in couples | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| ENV·43 | Shared pesticide susceptibility | Environment, Agriculture & Food | 6 | 4 | 2026-07-27 |
| WRK·45 | Shared schedule float | Work, Careers & Skilled Trades | 6 | 3 | 2026-07-27 |
| HOM·43 | Shared water supply flow | Home, Consumer & Everyday Life | 6 | 5 | 2026-07-27 |
| LAN·33 | Sharing cascades | Language, Media & Communication | 6 | 4 | 2026-07-27 |
| HIS·42 | Sharing under scarcity | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| HOM·44 | Sharpness | Home, Consumer & Everyday Life | 6 | 5 | 2026-07-26 |
| ENV·44 | Shear-thickening food pastes | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| WRK·46 | Shift handover | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| WRK·47 | Shift work | Work, Careers & Skilled Trades | 6 | 3 | 2026-07-26 |
| TRV·41 | Shipboard outbreak | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-27 |
| MIL·41 | Shoot-and-scoot artillery | Military, Conflict & Strategic Studies | 6 | 5 | 2026-07-26 |
| TRV·42 | Shoulder-season price cliff | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| HOM·45 | Shower curtain drift | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| FAM·37 | Shrinking social circles | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| CDA·201 | Shuffling before sorting | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| FAM·38 | Sibling deidentification | Family, Relationships & Human Development | 7 | 3 | 2026-07-26 |
| FAM·39 | Sibling differences | Family, Relationships & Human Development | 5 | 3 | 2026-07-26 |
| FAM·40 | Sibling regression | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| MIL·42 | Siege camp attrition | Military, Conflict & Strategic Studies | 7 | 2 | 2026-07-26 |
| LAN·34 | Sign language | Language, Media & Communication | 6 | 5 | 2026-07-26 |
| CDA·202 | Signing out everywhere | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| LAN·35 | Signing space | Language, Media & Communication | 7 | 0 | 2026-07-26 |
| CDA·203 | Silent data corruption | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| EAR·46 | Silicate weathering thermostat | Earth, Climate & Oceans | 6 | 2 | 2026-07-26 |
| GEO·40 | Silted harbours | Geography & Regional Studies | 7 | 5 | 2026-07-26 |
| FAM·41 | Similar partners | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| MAT·45 | Simpson's paradox | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| LAN·36 | Simultaneous interpreting | Language, Media & Communication | 6 | 2 | 2026-07-26 |
| TRV·43 | Single-queue service | Travel, Tourism & Hospitality | 6 | 5 | 2026-07-26 |
| GEO·41 | Sinking streams in karst | Geography & Regional Studies | 7 | 4 | 2026-07-26 |
| CDA·204 | Six names for one field | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| MAT·46 | Sizes of infinity | Mathematics & Statistics | 4 | 3 | 2026-07-25 |
| WRK·48 | Skilled diagnosis | Work, Careers & Skilled Trades | 5 | 3 | 2026-07-26 |
| AST·38 | Sky-background limit | Astronomy & Space | 6 | 4 | 2026-07-26 |
| PHY·41 | Skyglow | Physics | 6 | 7 | 2026-07-27 |
| MED·50 | Sleep | Health & Medicine | 6 | 4 | 2026-07-26 |
| MIN·44 | Sleeping on a problem | Mind & Behavior | 5 | 5 | 2026-07-26 |
| PHY·42 | Slippery ice | Physics | 5 | 4 | 2026-07-26 |
| EDU·34 | Small disruptions in a classroom | Education & Learning | 6 | 2 | 2026-07-26 |
| MAT·47 | Small-world networks | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| MIN·45 | Smell and memory | Mind & Behavior | 6 | 5 | 2026-07-26 |
| CHM·47 | Smell coding | Chemistry & Materials | 5 | 4 | 2026-07-26 |
| MIL·43 | Smuggling under sanctions | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-27 |
| CHM·48 | Soap cleaning | Chemistry & Materials | 4 | 3 | 2026-07-25 |
| PHY·43 | Soap film colours | Physics | 7 | 4 | 2026-07-26 |
| MIN·46 | Social loafing | Mind & Behavior | 7 | 4 | 2026-07-26 |
| HIS·43 | Societal collapse | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| CDA·205 | Software aging | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| ENV·45 | Soil carbon loss under ploughing | Environment, Agriculture & Food | 6 | 3 | 2026-07-26 |
| EAR·47 | Soil formation | Earth, Climate & Oceans | 5 | 4 | 2026-07-26 |
| ENV·46 | Soil test extractants | Environment, Agriculture & Food | 7 | 5 | 2026-07-27 |
| AST·39 | Solar cycle | Astronomy & Space | 6 | 4 | 2026-07-26 |
| PHY·44 | Solar sail propulsion | Physics | 6 | 5 | 2026-07-27 |
| ART·40 | Song intros and streaming payouts | Arts, Design & Culture | 6 | 4 | 2026-07-27 |
| PHY·45 | Sonoluminescence | Physics | 6 | 3 | 2026-07-26 |
| CDA·206 | Sorting more than fits | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| ENV·47 | Sourdough stability | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| TRV·44 | Souvenir craft convergence | Travel, Tourism & Hospitality | 6 | 0 | 2026-07-26 |
| AST·40 | Spacecraft cooling | Astronomy & Space | 6 | 5 | 2026-07-26 |
| EDU·35 | Spacing effect | Education & Learning | 6 | 4 | 2026-07-26 |
| GEO·42 | Spare transport links | Geography & Regional Studies | 6 | 4 | 2026-07-27 |
| LAN·37 | Speaking in noise | Language, Media & Communication | 6 | 5 | 2026-07-27 |
| PHI·41 | Speaking of the unspeakable | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| HOM·46 | Specialised cleaning agents | Home, Consumer & Everyday Life | 7 | 4 | 2026-07-27 |
| GOV·43 | Specialized courts | Government, Law & Civics | 6 | 5 | 2026-07-27 |
| CDA·207 | Speculative decoding | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| MIN·47 | Speed-accuracy tradeoff | Mind & Behavior | 6 | 4 | 2026-07-27 |
| LAN·38 | Spelling reform | Language, Media & Communication | 6 | 3 | 2026-07-26 |
| AST·41 | Spiral arms | Astronomy & Space | 6 | 4 | 2026-07-27 |
| EDU·36 | Split attention in materials | Education & Learning | 6 | 4 | 2026-07-26 |
| CDA·208 | Split-brain | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| PHI·42 | Splitting a person in two | Philosophy, Ethics & Religion | 6 | 1 | 2026-07-26 |
| CDA·209 | Splitting a system into services | Computing, Data & AI | 7 | 2 | 2026-07-26 |
| SPT·45 | Stadium wave | Sports, Exercise & Recreation | 6 | 4 | 2026-07-27 |
| ART·41 | Stage lighting angle | Arts, Design & Culture | 6 | 3 | 2026-07-26 |
| WRK·49 | Standard stud spacing | Work, Careers & Skilled Trades | 5 | 4 | 2026-07-27 |
| GOV·44 | Standards of proof | Government, Law & Civics | 6 | 3 | 2026-07-26 |
| GOV·45 | Standing to sue | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| AST·42 | Star colors | Astronomy & Space | 3 | 4 | 2026-07-25 |
| AST·43 | Star formation | Astronomy & Space | 7 | 4 | 2026-07-26 |
| PHY·46 | Static electricity | Physics | 4 | 2 | 2026-07-25 |
| GOV·46 | Statutes of limitation | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| GOV·47 | Statutory interpretation canons | Government, Law & Civics | 7 | 2 | 2026-07-26 |
| MED·51 | Steady-state dosing | Health & Medicine | 6 | 2 | 2026-07-26 |
| MIL·44 | Stealth tradeoff | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-26 |
| AST·44 | Stellar hydrostatic balance | Astronomy & Space | 6 | 4 | 2026-07-26 |
| TRV·45 | Step climb | Travel, Tourism & Hospitality | 6 | 0 | 2026-07-26 |
| FAM·42 | Stepparent acceptance | Family, Relationships & Human Development | 6 | 0 | 2026-07-26 |
| BIO·46 | Sterile worker castes | Biology & Ecology | 7 | 4 | 2026-07-26 |
| ECO·46 | Stockout demand censoring | Economics & Business | 6 | 4 | 2026-07-26 |
| ART·42 | Story shape | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| MIL·45 | Strategic deception | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-26 |
| MAT·48 | Stratified sampling | Mathematics & Statistics | 6 | 4 | 2026-07-27 |
| MIN·48 | Streaks in random sequences | Mind & Behavior | 6 | 5 | 2026-07-27 |
| GEO·43 | Street network topology | Geography & Regional Studies | 6 | 5 | 2026-07-27 |
| ENG·41 | Stress concentration | Engineering & Technology | 6 | 4 | 2026-07-26 |
| FAM·43 | Stress spillover at home | Family, Relationships & Human Development | 6 | 4 | 2026-07-27 |
| EDU·37 | Subject specialists in primary school | Education & Learning | 6 | 3 | 2026-07-27 |
| HOM·47 | Subscription inertia | Home, Consumer & Everyday Life | 5 | 3 | 2026-07-26 |
| EDU·38 | Substitute teacher cover | Education & Learning | 6 | 3 | 2026-07-27 |
| PHI·43 | Substitutionary sacrifice | Philosophy, Ethics & Religion | 6 | 5 | 2026-07-27 |
| EDU·39 | Summer learning loss | Education & Learning | 6 | 3 | 2026-07-26 |
| ECO·47 | Sunk cost | Economics & Business | 5 | 4 | 2026-07-26 |
| PHY·47 | Superconducting levitation | Physics | 6 | 4 | 2026-07-26 |
| PHY·48 | Supercooled water | Physics | 7 | 0 | 2026-07-26 |
| CHM·49 | Supercooling | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| PHI·44 | Supererogation | Philosophy, Ethics & Religion | 6 | 3 | 2026-07-26 |
| ENV·48 | Supermarket tomato flavour | Environment, Agriculture & Food | 5 | 4 | 2026-07-26 |
| BIO·47 | Supernormal stimuli | Biology & Ecology | 6 | 5 | 2026-07-27 |
| MED·52 | Surgical volume-outcome relationship | Health & Medicine | 6 | 4 | 2026-07-27 |
| CDA·210 | Surrogate keys | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| AST·45 | Survey and follow-up telescopes | Astronomy & Space | 6 | 4 | 2026-07-27 |
| MAT·49 | Survivorship bias | Mathematics & Statistics | 7 | 4 | 2026-07-26 |
| ENG·42 | Suspension bridge cables | Engineering & Technology | 4 | 4 | 2026-07-25 |
| ENG·43 | Swarm robotics | Engineering & Technology | 6 | 4 | 2026-07-27 |
| BIO·48 | Sweet fruit, guarded seed | Biology & Ecology | 6 | 3 | 2026-07-26 |
| BIO·49 | Symbiosis | Biology & Ecology | 5 | 4 | 2026-07-26 |
| MIN·49 | Synaptic pruning | Mind & Behavior | 6 | 5 | 2026-07-27 |
| ENV·49 | Synchronised planting windows | Environment, Agriculture & Food | 6 | 4 | 2026-07-27 |
| MIN·50 | Synchronized applause | Mind & Behavior | 6 | 4 | 2026-07-27 |
| CDA·211 | Synthetic versus real users | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| CDA·212 | System prompt priority | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·213 | Tags versus digests | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·214 | Tail latency | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| PHI·45 | Taking moral advice on trust | Philosophy, Ethics & Religion | 7 | 4 | 2026-07-26 |
| CDA·215 | Talked out of its own rules | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| PHI·46 | Talking about what does not exist | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-26 |
| ECO·48 | Tax competition | Economics & Business | 6 | 5 | 2026-07-27 |
| GOV·48 | Tax incidence | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| EDU·40 | Teacher attrition in hard schools | Education & Learning | 6 | 3 | 2026-07-26 |
| EDU·41 | Teacher expectations | Education & Learning | 7 | 3 | 2026-07-26 |
| EDU·42 | Teaching to the test | Education & Learning | 6 | 4 | 2026-07-26 |
| PHY·49 | Tears of wine | Physics | 6 | 3 | 2026-07-26 |
| CDA·216 | Technical debt | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| ENG·44 | Technical standards | Engineering & Technology | 6 | 5 | 2026-07-26 |
| HIS·44 | Technology loss | History, Society & Anthropology | 5 | 3 | 2026-07-26 |
| FAM·44 | Teenage sleep phase | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| LAN·39 | Telephone bandwidth | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| HIS·45 | Tell mounds | History, Society & Anthropology | 6 | 4 | 2026-07-27 |
| CDA·217 | Temperature | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CHM·50 | Tempered glass | Chemistry & Materials | 6 | 3 | 2026-07-26 |
| SPT·46 | Tendon rehabilitation loading | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| GOV·49 | Term limits | Government, Law & Civics | 6 | 4 | 2026-07-26 |
| PHY·50 | Terminal velocity of raindrops | Physics | 6 | 4 | 2026-07-26 |
| EDU·43 | Test validity | Education & Learning | 6 | 4 | 2026-07-26 |
| CDA·218 | Testability as a design property | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| MAT·50 | Testing many questions at once | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| LAN·40 | Text message tone | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| HIS·46 | Textual criticism | History, Society & Anthropology | 6 | 5 | 2026-07-27 |
| CDA·219 | The agent loop | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·220 | The audit record as the product | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| AST·46 | The backwards magnitude scale | Astronomy & Space | 6 | 5 | 2026-07-27 |
| CDA·221 | The blocking commit | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·222 | The CAP theorem | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| TRV·46 | The dish nobody orders | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| CDA·223 | The distributed monolith | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| BIO·50 | The error threshold on genome length | Biology & Ecology | 6 | 6 | 2026-07-27 |
| CDA·224 | The first process | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| EDU·44 | The fourth-grade slump | Education & Learning | 6 | 0 | 2026-07-26 |
| WRK·50 | The informal org chart | Work, Careers & Skilled Trades | 6 | 2 | 2026-07-27 |
| PHI·47 | The liturgical calendar | Philosophy, Ethics & Religion | 7 | 4 | 2026-07-27 |
| ART·43 | The loudness war | Arts, Design & Culture | 6 | 5 | 2026-07-27 |
| CDA·225 | The middleman that reduces connections | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·226 | The noisy neighbour | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| MIL·46 | The nuclear triad | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-27 |
| CDA·227 | The occasionally expensive operation | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·228 | The outbox | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·229 | The paved road | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| CDA·230 | The price of being able to leave | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| PHI·48 | The problem of other minds | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-27 |
| CDA·231 | The publisher that knows no subscribers | Computing, Data & AI | 7 | 2 | 2026-07-26 |
| CDA·232 | The semantic layer | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| EDU·45 | The silent classroom | Education & Learning | 6 | 3 | 2026-07-26 |
| CDA·233 | The singleton regret | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·234 | The small files problem | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| FAM·45 | The small last straw | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| BIO·51 | The soil seed bank | Biology & Ecology | 6 | 4 | 2026-07-27 |
| CDA·235 | The sorting floor | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| PHI·49 | The state of nature | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-27 |
| CDA·236 | The test pyramid | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| PHI·50 | The two-witness rule | Philosophy, Ethics & Religion | 6 | 4 | 2026-07-27 |
| CDA·237 | The untidy shape that answers faster | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| WRK·51 | The wire that carries nothing | Work, Careers & Skilled Trades | 7 | 0 | 2026-07-26 |
| ART·44 | The workshop's many hands | Arts, Design & Culture | 6 | 5 | 2026-07-27 |
| EDU·46 | The zero-sum timetable | Education & Learning | 6 | 5 | 2026-07-27 |
| PHY·51 | Thermal conductivity of touch | Physics | 6 | 4 | 2026-07-26 |
| ENG·45 | Thermal noise floor | Engineering & Technology | 6 | 5 | 2026-07-27 |
| ENG·46 | Thermal throttling | Engineering & Technology | 7 | 4 | 2026-07-26 |
| HOM·48 | Thermostat overshoot | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| CDA·238 | Thinking budget | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·239 | Three kinds of responsible person | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·240 | Three questions people treat as one | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| ENG·47 | Three-bladed turbines | Engineering & Technology | 6 | 4 | 2026-07-26 |
| CHM·51 | Three-way catalytic converter | Chemistry & Materials | 6 | 5 | 2026-07-27 |
| AST·47 | Tidal locking | Astronomy & Space | 3 | 3 | 2026-07-25 |
| MAT·51 | Time average versus ensemble average | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| CDA·241 | Time to first token | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| GEO·44 | Time zones | Geography & Regional Studies | 6 | 5 | 2026-07-26 |
| SPT·47 | Time-of-day performance peak | Sports, Exercise & Recreation | 6 | 4 | 2026-07-27 |
| SPT·48 | Timing resolution in racing | Sports, Exercise & Recreation | 6 | 4 | 2026-07-27 |
| TRV·47 | Tipping customs | Travel, Tourism & Hospitality | 6 | 2 | 2026-07-26 |
| FAM·46 | Toddler tantrums | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| CDA·242 | Tokenization | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| ENG·48 | Tolerance stack-up | Engineering & Technology | 7 | 4 | 2026-07-26 |
| CDA·243 | Tool calling boundary | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·244 | Tool granularity | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| TRV·48 | Tourism seasonality | Travel, Tourism & Hospitality | 6 | 4 | 2026-07-26 |
| GEO·45 | Town spacing | Geography & Regional Studies | 6 | 5 | 2026-07-26 |
| HOM·49 | Tracing a leak | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-27 |
| ECO·49 | Trade credit | Economics & Business | 6 | 2 | 2026-07-26 |
| WRK·52 | Trade demarcation | Work, Careers & Skilled Trades | 6 | 2 | 2026-07-26 |
| HIS·47 | Trade diasporas | History, Society & Anthropology | 6 | 3 | 2026-07-26 |
| LAN·41 | Trade jargon | Language, Media & Communication | 6 | 3 | 2026-07-26 |
| SPT·49 | Trail braiding | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| EDU·47 | Train-the-trainer cascades | Education & Learning | 6 | 3 | 2026-07-27 |
| MIL·47 | Training cadre bottleneck | Military, Conflict & Strategic Studies | 6 | 4 | 2026-07-26 |
| SPT·50 | Training taper | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| CDA·245 | Transactions on immutable storage | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| LAN·42 | Transcribed speech | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| EDU·48 | Transfer of learning | Education & Learning | 6 | 5 | 2026-07-26 |
| ENG·49 | Transformer inrush | Engineering & Technology | 7 | 4 | 2026-07-26 |
| CDA·246 | Transformer parallelism | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| GEO·46 | Transhumance | Geography & Regional Studies | 6 | 4 | 2026-07-27 |
| LAN·43 | Translation equivalence | Language, Media & Communication | 5 | 3 | 2026-07-26 |
| MED·53 | Transplant rejection | Health & Medicine | 6 | 4 | 2026-07-26 |
| TRV·49 | Traveler herding | Travel, Tourism & Hospitality | 5 | 3 | 2026-07-26 |
| TRV·50 | Traveler's stomach | Travel, Tourism & Hospitality | 5 | 4 | 2026-07-27 |
| EAR·48 | Tree-ring evidence | Earth, Climate & Oceans | 3 | 4 | 2026-07-25 |
| ENV·50 | Trophic cost of meat | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| FAM·47 | Trust asymmetry | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| EAR·49 | Tsunami shoaling | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| ENG·50 | Tuning to the test cycle | Engineering & Technology | 6 | 5 | 2026-07-27 |
| EAR·50 | Turbidity currents | Earth, Climate & Oceans | 7 | 3 | 2026-07-26 |
| EDU·49 | Tutoring versus class size | Education & Learning | 6 | 4 | 2026-07-26 |
| CDA·247 | Twenty-five acronyms, nine pieces | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| EAR·51 | Twice-daily tides | Earth, Climate & Oceans | 6 | 4 | 2026-07-26 |
| FAM·48 | Twin language delay | Family, Relationships & Human Development | 6 | 3 | 2026-07-26 |
| AST·48 | Two gravitational-wave detectors | Astronomy & Space | 6 | 5 | 2026-07-27 |
| CDA·248 | Two stores for one truth | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·249 | Two systems, one record | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| ECO·50 | Two-sided market launch | Economics & Business | 6 | 3 | 2026-07-26 |
| CDA·250 | Two-stage retrieval | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| TRV·51 | Two-way ratings | Travel, Tourism & Hospitality | 7 | 0 | 2026-07-26 |
| ART·45 | Typeface voice | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| MAT·52 | Ubiquity of the bell curve | Mathematics & Statistics | 7 | 5 | 2026-07-26 |
| LAN·44 | Unavoidable ambiguity | Language, Media & Communication | 6 | 4 | 2026-07-27 |
| CDA·251 | Undefined behaviour | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| PHI·51 | Underdetermination of theory | Philosophy, Ethics & Religion | 7 | 3 | 2026-07-26 |
| ART·46 | Understudies | Arts, Design & Culture | 6 | 5 | 2026-07-27 |
| FAM·49 | Undifferentiated infant cry | Family, Relationships & Human Development | 6 | 3 | 2026-07-27 |
| MIN·51 | Unfinished tasks | Mind & Behavior | 5 | 4 | 2026-07-26 |
| LAN·45 | Uninformative advertising | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| MIL·48 | Unit combat learning curve | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-27 |
| HOM·50 | Unit-price inversion | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| CDA·252 | Unknown unknowns | Computing, Data & AI | 7 | 3 | 2026-07-26 |
| LAN·46 | Unnamed sources | Language, Media & Communication | 6 | 5 | 2026-07-27 |
| HIS·48 | Unplanned settlement form | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| MAT·53 | Unstable averages | Mathematics & Statistics | 6 | 4 | 2026-07-26 |
| MIL·49 | Unusable intelligence | Military, Conflict & Strategic Studies | 7 | 4 | 2026-07-26 |
| EDU·50 | Unused curriculum | Education & Learning | 6 | 4 | 2026-07-26 |
| FAM·50 | Unwritten household rules | Family, Relationships & Human Development | 6 | 5 | 2026-07-27 |
| LAN·47 | Unwritten vowels in abjads | Language, Media & Communication | 6 | 0 | 2026-07-26 |
| GEO·47 | Urban growth boundaries | Geography & Regional Studies | 6 | 4 | 2026-07-27 |
| GEO·48 | Urban heat islands | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| HIS·49 | Urban mortality | History, Society & Anthropology | 6 | 5 | 2026-07-26 |
| ECO·51 | Vacancies alongside unemployment | Economics & Business | 6 | 3 | 2026-07-26 |
| PHI·52 | Vagueness | Philosophy, Ethics & Religion | 6 | 5 | 2026-07-26 |
| ART·47 | Value of the original | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| EDU·51 | Value-added ranking instability | Education & Learning | 6 | 4 | 2026-07-26 |
| ART·48 | Varnish removal | Arts, Design & Culture | 6 | 3 | 2026-07-26 |
| AST·49 | Venus superrotation | Astronomy & Space | 7 | 3 | 2026-07-26 |
| MIL·50 | Verified disarmament | Military, Conflict & Strategic Studies | 7 | 0 | 2026-07-26 |
| GEO·49 | Vernacular house form | Geography & Regional Studies | 7 | 4 | 2026-07-27 |
| BIO·52 | Vernalization | Biology & Ecology | 6 | 3 | 2026-07-26 |
| CDA·253 | Vertical and horizontal scaling | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| ENG·51 | Vibration isolator resonance | Engineering & Technology | 7 | 3 | 2026-07-26 |
| SPT·51 | Video review boundaries | Sports, Exercise & Recreation | 6 | 4 | 2026-07-26 |
| HIS·50 | Village pasture stinting | History, Society & Anthropology | 6 | 4 | 2026-07-27 |
| ART·49 | Vinegar syndrome | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| MED·54 | Viral load kinetics | Health & Medicine | 6 | 4 | 2026-07-27 |
| BIO·53 | Virulence and transmission | Biology & Ecology | 6 | 4 | 2026-07-26 |
| TRV·52 | Visa reciprocity | Travel, Tourism & Hospitality | 7 | 2 | 2026-07-26 |
| CHM·52 | Viscoelastic putty | Chemistry & Materials | 6 | 2 | 2026-07-26 |
| ART·50 | Visual grouping | Arts, Design & Culture | 6 | 5 | 2026-07-26 |
| EDU·52 | Vocabulary gap widening | Education & Learning | 6 | 3 | 2026-07-26 |
| ART·51 | Voice recording mismatch | Arts, Design & Culture | 6 | 4 | 2026-07-26 |
| PHY·52 | Vortex shedding | Physics | 6 | 2 | 2026-07-26 |
| GOV·50 | Voting rules | Government, Law & Civics | 5 | 5 | 2026-07-26 |
| LAN·48 | Vowel chain shifts | Language, Media & Communication | 6 | 0 | 2026-07-26 |
| ECO·52 | Wage stickiness | Economics & Business | 6 | 3 | 2026-07-26 |
| MIL·51 | Wargaming | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-27 |
| CDA·254 | Warm reuse leaks | Computing, Data & AI | 7 | 5 | 2026-07-26 |
| EAR·52 | Warming hiatus | Earth, Climate & Oceans | 6 | 5 | 2026-07-27 |
| HOM·51 | Warranty timing | Home, Consumer & Everyday Life | 6 | 4 | 2026-07-26 |
| MIL·52 | Wartime turnover of commanders | Military, Conflict & Strategic Studies | 6 | 3 | 2026-07-27 |
| HOM·52 | Washing machine odour | Home, Consumer & Everyday Life | 6 | 3 | 2026-07-26 |
| ENG·52 | Water hammer | Engineering & Technology | 7 | 4 | 2026-07-26 |
| MIN·52 | Wayfinding | Mind & Behavior | 5 | 3 | 2026-07-26 |
| PHI·53 | Weakness of will | Philosophy, Ethics & Religion | 6 | 5 | 2026-07-26 |
| EAR·53 | Weather observing network | Earth, Climate & Oceans | 6 | 5 | 2026-07-27 |
| ENV·51 | Weed seed banks | Environment, Agriculture & Food | 6 | 4 | 2026-07-26 |
| SPT·52 | Weight cutting | Sports, Exercise & Recreation | 7 | 0 | 2026-07-26 |
| WRK·53 | Welding distortion | Work, Careers & Skilled Trades | 6 | 0 | 2026-07-26 |
| CDA·255 | What a list of numbers remembers | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·256 | What an assistant should forget | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| AST·50 | What is a black hole? | Astronomy & Space | 7 | 6 | 2026-07-25 |
| ECO·53 | What is inflation? | Economics & Business | 7 | 7 | 2026-07-25 |
| PHI·54 | What makes an argument logically valid? | Philosophy, Ethics & Religion | 6 | 7 | 2026-07-25 |
| ENV·52 | What makes bread rise? | Environment, Agriculture & Food | 7 | 7 | 2026-07-25 |
| AST·51 | What meteorite collections over-represent | Astronomy & Space | 6 | 5 | 2026-07-27 |
| ART·52 | What notation cannot record | Arts, Design & Culture | 6 | 4 | 2026-07-27 |
| CDA·257 | What one row stands for | Computing, Data & AI | 6 | 6 | 2026-07-26 |
| ART·53 | What survived from antiquity | Arts, Design & Culture | 6 | 5 | 2026-07-27 |
| CDA·258 | When removing duplication hurts | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·259 | When responsibility transfers | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·260 | When the best step now is safe | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| CDA·261 | Where a fact lives in a model | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| GEO·50 | Where a river begins | Geography & Regional Studies | 6 | 4 | 2026-07-27 |
| GEO·51 | Where parks end up | Geography & Regional Studies | 6 | 3 | 2026-07-26 |
| CDA·262 | Where the time actually goes | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·263 | Where the transform sits | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| GOV·51 | Which disputes reach trial | Government, Law & Civics | 6 | 5 | 2026-07-27 |
| CDA·264 | Which record is the real one | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| PHY·53 | Whip crack | Physics | 7 | 4 | 2026-07-26 |
| GOV·52 | Whistleblower protection | Government, Law & Civics | 6 | 0 | 2026-07-26 |
| LAN·49 | Whistled languages | Language, Media & Communication | 6 | 2 | 2026-07-26 |
| WRK·54 | Who leaves first | Work, Careers & Skilled Trades | 7 | 4 | 2026-07-26 |
| CDA·265 | Why a code sent to your phone does not stop phishing | Computing, Data & AI | 7 | 4 | 2026-07-26 |
| CDA·266 | Why adding a worker stops the others | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| GOV·53 | Why do democracies separate powers? | Government, Law & Civics | 6 | 5 | 2026-07-25 |
| EAR·54 | Why do earthquakes happen? | Earth, Climate & Oceans | 6 | 7 | 2026-07-25 |
| LAN·50 | Why do languages change over time? | Language, Media & Communication | 7 | 6 | 2026-07-25 |
| BIO·54 | Why do leaves change color? | Biology & Ecology | 6 | 6 | 2026-07-25 |
| MIN·53 | Why do we procrastinate? | Mind & Behavior | 7 | 6 | 2026-07-25 |
| PHY·54 | Why is the sky blue? | Physics | 6 | 6 | 2026-07-25 |
| CDA·267 | Why the average recovery time lies | Computing, Data & AI | 6 | 3 | 2026-07-26 |
| ENG·53 | Wi-Fi channel congestion | Engineering & Technology | 6 | 4 | 2026-07-27 |
| AST·52 | Widmanstatten pattern | Astronomy & Space | 7 | 3 | 2026-07-26 |
| FAM·51 | Widowhood and health | Family, Relationships & Human Development | 6 | 0 | 2026-07-26 |
| ENG·54 | Wind farm wake losses | Engineering & Technology | 6 | 3 | 2026-07-26 |
| BIO·55 | Wind-hardened tree form | Biology & Ecology | 6 | 6 | 2026-07-27 |
| GEO·52 | Windward wealth divide | Geography & Regional Studies | 6 | 4 | 2026-07-26 |
| ECO·54 | Winner's curse | Economics & Business | 6 | 3 | 2026-07-26 |
| HIS·51 | Witch-hunt cascades | History, Society & Anthropology | 6 | 4 | 2026-07-26 |
| HOM·53 | Wobbly table | Home, Consumer & Everyday Life | 6 | 3 | 2026-07-26 |
| LAN·51 | Word length | Language, Media & Communication | 5 | 3 | 2026-07-26 |
| LAN·52 | Word order | Language, Media & Communication | 6 | 4 | 2026-07-26 |
| LAN·53 | Word spacing in writing | Language, Media & Communication | 7 | 0 | 2026-07-26 |
| WRK·55 | Word-of-mouth trade pipeline | Work, Careers & Skilled Trades | 6 | 2 | 2026-07-27 |
| LAN·54 | Wordless instructions | Language, Media & Communication | 6 | 0 | 2026-07-26 |
| CDA·268 | Words stored by their beginnings | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CHM·53 | Work hardening | Chemistry & Materials | 6 | 4 | 2026-07-26 |
| WRK·56 | Working to rule | Work, Careers & Skilled Trades | 6 | 4 | 2026-07-26 |
| FAM·52 | Worst behaviour at home | Family, Relationships & Human Development | 6 | 4 | 2026-07-26 |
| MED·55 | Wound healing | Health & Medicine | 6 | 4 | 2026-07-26 |
| CDA·269 | Wrapping without changing | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·270 | Write amplification | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·271 | Writing down what you could not determine | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| HIS·52 | Writing invention | History, Society & Anthropology | 6 | 3 | 2026-07-26 |
| CDA·272 | Writing the test first | Computing, Data & AI | 6 | 4 | 2026-07-26 |
| CDA·273 | Wrong with nothing missing | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| AST·53 | Yarkovsky effect | Astronomy & Space | 6 | 3 | 2026-07-26 |
| ENV·53 | Yield and protein in wheat | Environment, Agriculture & Food | 6 | 3 | 2026-07-26 |
| CDA·274 | You cannot un-issue a signature | Computing, Data & AI | 6 | 5 | 2026-07-26 |
| AST·54 | Zodiacal dust replenishment | Astronomy & Space | 6 | 3 | 2026-07-26 |
| EDU·53 | Zone of proximal development | Education & Learning | 6 | 3 | 2026-07-27 |
| GEO·53 | Zoning envelope architecture | Geography & Regional Studies | 6 | 4 | 2026-07-27 |