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Fundamental physics and spacetime

Quantum theory, gravity, spacetime, cosmology, and fundamental physical reality.

9,903 stories · 130 in 30 days · Updated Sep 28, 2026

The pace of conversation

Posts per month

2020-01: 139 posts2020-02: 136 posts2020-03: 122 posts2020-04: 161 posts2020-05: 149 posts2020-06: 178 posts2020-07: 161 posts2020-08: 155 posts2020-09: 162 posts2020-10: 160 posts2020-11: 128 posts2020-12: 135 posts2021-01: 121 posts2021-02: 86 posts2021-03: 150 posts2021-04: 131 posts2021-05: 143 posts2021-06: 110 posts2021-07: 118 posts2021-08: 126 posts2021-09: 108 posts2021-10: 103 posts2021-11: 107 posts2021-12: 112 posts2022-01: 139 posts2022-02: 99 posts2022-03: 121 posts2022-04: 104 posts2022-05: 92 posts2022-06: 115 posts2022-07: 127 posts2022-08: 117 posts2022-09: 99 posts2022-10: 104 posts2022-11: 124 posts2022-12: 115 posts2023-01: 111 posts2023-02: 108 posts2023-03: 102 posts2023-04: 115 posts2023-05: 111 posts2023-06: 108 posts2023-07: 142 posts2023-08: 174 posts2023-09: 125 posts2023-10: 135 posts2023-11: 73 posts2023-12: 149 posts2024-01: 142 posts2024-02: 135 posts2024-03: 118 posts2024-04: 142 posts2024-05: 126 posts2024-06: 108 posts2024-07: 100 posts2024-08: 101 posts2024-09: 139 posts2024-10: 127 posts2024-11: 114 posts2024-12: 110 posts2025-01: 107 posts2025-02: 122 posts2025-03: 104 posts2025-04: 147 posts2025-05: 105 posts2025-06: 116 posts2025-07: 106 posts2025-08: 106 posts2025-09: 117 posts2025-10: 117 posts2025-11: 124 posts2025-12: 135 posts2026-01: 126 posts2026-02: 110 posts2026-03: 132 posts2026-04: 103 posts2026-05: 101 posts2026-06: 117 posts2026-07: 106 posts2026-08: 107 posts2026-09: 123 posts
2020-012026-09

Posts per month · first and latest months may be partial.

01 / EXPLORE THROUGH TIME

Timeline

Start with the latest. Scroll back through time, or zoom in for more.

Year by yearUp to 5 stories per year
20261,025 stories
Show HN: What if the speed of light was 5 km/h?↗ rivendell.dmitrybrant.com · HN · 290 comments · 633 points · Sep 10, 2026
Antimatter has been transported for the first time↗ nature.com · HN · 203 comments · 421 points · Mar 25, 2026
GPT-5.2 derives a new result in theoretical physics↗ openai.com · HN · 401 comments · 574 points · Feb 13, 2026
The Feynman Lectures on Physics (1961-1964)↗ feynmanlectures.caltech.edu · HN · 141 comments · 490 points · Feb 10, 2026
The Jeff Dean Facts↗ github.com · HN · 184 comments · 558 points · Jan 08, 2026
20251,406 stories
Show HN: Strange Attractors↗ blog.shashanktomar.com · HN · 78 comments · 804 points · Oct 31, 2025
Nobel Prize in Physics 2025↗ nobelprize.org · HN · 99 comments · 476 points · Oct 07, 2025
Electron band structure in germanium, my ass (2001)↗ pages.cs.wisc.edu · HN · 407 comments · 903 points · Apr 01, 2025
Half-Life↗ filfre.net · HN · 231 comments · 547 points · Feb 23, 2025
Science YouTuber physicsgirl (Dianna Cowern) stands for the first time in 2 yrs↗ youtube.com · HN · 301 comments · 783 points · Jan 29, 2025
20241,462 stories
Nobel Prize in Physics awarded to John Hopfield and Geoffrey Hinton [pdf]↗ nobelprize.org · HN · 794 comments · 943 points · Oct 08, 2024
In 1870, Lord Rayleigh used oil and water to calculate the size of molecules↗ atomsonly.news · HN · 197 comments · 571 points · Sep 23, 2024
An intuitive guide to Maxwell's equations (2020)↗ photonlines.substack.com · HN · 133 comments · 553 points · Jun 02, 2024
Peter Higgs, physicist who discovered Higgs boson, has died↗ theguardian.com · HN · 104 comments · 945 points · Apr 09, 2024
Inside the proton, the ‘most complicated thing you could possibly imagine’↗ quantamagazine.org · HN · 567 comments · 612 points · Feb 14, 2024
20231,453 stories
New theory seeks to unite Einstein's gravity with quantum mechanics↗ ucl.ac.uk · HN · 66 comments · 80 points · Dec 30, 2023
Particle Life↗ github.com · HN · 94 comments · 360 points · Dec 28, 2023
Schrödinger equation emerges mathematically from classical mechanics (2012)↗ researchgate.net · HN · 86 comments · 191 points · Dec 22, 2023
Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O↗ arxiv.org · HN · 36 comments · 98 points · Aug 03, 2023
Feynman Lectures on Physics now online↗ feynmanlectures.caltech.edu · HN · 10 comments · 47 points · May 21, 2023
20221,356 stories
AlphaFold reveals the structure of the protein universe↗ deepmind.com · HN · 236 comments · 633 points · Jul 28, 2022
Large Hadron Collider discovers three new exotic particles↗ home.cern · HN · 273 comments · 767 points · Jul 05, 2022
Ten years after the Higgs, physicists face the nightmare of finding nothing else↗ science.org · HN · 301 comments · 423 points · Jun 15, 2022
I stopped working on black hole information loss↗ backreaction.blogspot.com · HN · 356 comments · 461 points · Apr 23, 2022
A delightful quirk of relativity theory↗ twitter.com · HN · 225 comments · 376 points · Jan 18, 2022
20211,415 stories
Scientists create matter from pure light, proving the Breit-Wheeler effect↗ bnl.gov · HN · 204 comments · 399 points · Sep 14, 2021
New exotic matter particle, a tetraquark, discovered at CERN↗ phys.org · HN · 209 comments · 555 points · Jul 30, 2021
Electromagnetism is a property of spacetime itself, study finds↗ sciencex.com · HN · 177 comments · 397 points · Jul 24, 2021
Poisson's Equation↗ mattferraro.dev · HN · 159 comments · 766 points · Jul 06, 2021
Particle mystery: physicists confirm the muon is more magnetic than predicted↗ sciencemag.org · HN · 292 comments · 560 points · Apr 07, 2021
20201,786 stories
Gravity is not a force – free-fall parabolas are straight lines in spacetime↗ timhutton.github.io · HN · 433 comments · 801 points · Oct 18, 2020
The Wolfram Physics Project↗ writings.stephenwolfram.com · HN · 323 comments · 588 points · Apr 14, 2020
Ask HN: How to self-study physics?↗ news.ycombinator.com · HN · 184 comments · 451 points · Mar 25, 2020
Freeman Dyson Has Died↗ nytimes.com · HN · 248 comments · 1238 points · Feb 28, 2020
Evidence that the key assumption made in discovery of dark energy is in error↗ phys.org · HN · 286 comments · 486 points · Jan 06, 2020
Scroll through time ↕

02 / CATCH UP

The conversation now

Popular stories, with attention fading over roughly two weeks.

Gravity seems holographic. What does that mean for reality?↗ quantamagazine.org · HN · 233 comments · 297 points · Sep 25, 2026
Show HN: What if the speed of light was 5 km/h?↗ rivendell.dmitrybrant.com · HN · 290 comments · 633 points · Sep 10, 2026
One-Electron Universe↗ en.wikipedia.org · HN · 94 comments · 117 points · Sep 20, 2026
The Relation Between Mathematics and Physics by Paul Dirac (1939)↗ damtp.cam.ac.uk · HN · 84 comments · 172 points · Sep 13, 2026
Scientists observe Einstein's gravity in the quantum world↗ ox.ac.uk · HN · 99 comments · 263 points · Sep 04, 2026

03 / GO DEEPER

Follow your curiosity

Find a particular story, revisit a year, or see what resonated.

Highest rated · the last 30 days

Show HN: What if the speed of light was 5 km/h?↗ rivendell.dmitrybrant.com · HN · 290 comments · 633 points · Sep 10, 2026
Gravity seems holographic. What does that mean for reality?↗ quantamagazine.org · HN · 233 comments · 297 points · Sep 25, 2026
Scientists observe Einstein's gravity in the quantum world↗ ox.ac.uk · HN · 99 comments · 263 points · Sep 04, 2026
The Relation Between Mathematics and Physics by Paul Dirac (1939)↗ damtp.cam.ac.uk · HN · 84 comments · 172 points · Sep 13, 2026
One-Electron Universe↗ en.wikipedia.org · HN · 94 comments · 117 points · Sep 20, 2026
The k-server conjecture is true↗ arxiv.org · HN · 35 comments · 106 points · Sep 15, 2026
Earth's organisms developed via evolution. What if the cosmos did, too?↗ smithsonianmag.com · HN · 69 comments · 105 points · Sep 02, 2026
How good are frontier models at physics?↗ arxiv.org · HN · 50 comments · 100 points · Sep 16, 2026
Sean Carroll explains the biggest ideas in the universe – Full Interview [video] (2025)↗ youtube.com · HN · 30 comments · 97 points · Sep 10, 2026
Why Does the Universe Expand?↗ cosmicave.org · HN · 77 comments · 82 points · Sep 16, 2026

10 stories shown.

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