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4D rotations are the symmetries giving conservation of the eccentricity vector

https://johncarlosbaez.wordpress.com/2025/07/20/the-kepler-problem-part-4/
4•ColinWright•3h ago

Long-lost giant rivers that flowed across Antarctica up to 80M years ago

https://www.livescience.com/planet-earth/antarctica/scientists-discover-long-lost-giant-rivers-that-flowed-across-antarctica-up-to-80-million-years-ago
1•Bluestein•58s ago•0 comments

The Veo 3 API is now available

https://developers.googleblog.com/en/veo-3-now-available-gemini-api/
1•logankilpatrick•1m ago•0 comments

Before Macintosh: The Apple Lisa (2024) [video]

https://www.youtube.com/watch?v=psAeTDYezdo
1•ayaros•2m ago•1 comments

Ask HN: Newsletters for programmers about developing automations?

1•pinter69•6m ago•0 comments

What Makes Boeing's Doomsday Plane Different from Air Force One?

https://www.jalopnik.com/1914783/united-states-government-boeing-air-force-one-e4-doomsday-plane-differences/
1•rntn•7m ago•0 comments

'Ghostbusters' Fans Be Warned: Those Old Ecto-Coolers Are Exploding

https://www.cracked.com/article_47111_ghostbusters-fans-be-warned-those-old-ecto-coolers-are-exploding.html
1•Bluestein•8m ago•1 comments

A Survey of Context Engineering for Large Language Models

https://arxiv.org/abs/2507.13334
1•pscoro•12m ago•0 comments

Vibe Coding Deleted Production Database

https://twitter.com/jasonlk/status/1946239068691665187
4•codegeek•12m ago•1 comments

Speeding Up My ZSH Shell

https://scottspence.com/posts/speeding-up-my-zsh-shell
2•saikatsg•14m ago•0 comments

Checklists are hard (but still a good thing)

https://utcc.utoronto.ca/~cks/space/blog/sysadmin/ChecklistsAreHardButGood
1•zdw•14m ago•0 comments

Categorizing Book Notes with AI

https://mieubrisse.substack.com/p/categorizing-book-notes-with-ai
1•mieubrisse•15m ago•0 comments

Baqpaq for personal data backups on Linux systems

https://store.teejeetech.com/product/baqpaq/
1•dxs•16m ago•0 comments

HTMX Edit Row Example in HARC Stack

https://rakujourney.wordpress.com/2025/07/20/harc-stack-editing/
2•librasteve•22m ago•1 comments

Context Engineering for AI Agents: Lessons from Building Manus

https://manus.im/blog/Context-Engineering-for-AI-Agents-Lessons-from-Building-Manus
1•freediver•23m ago•0 comments

Google inks its first fusion power deal with Commonwealth Fusion Systems

https://techcrunch.com/2025/06/30/google-inks-its-first-fusion-power-deal-with-commonwealth-fusion-systems/
1•mpweiher•26m ago•0 comments

I Spy: Escalating to Entra ID's Global Admin with a First-Party App

https://securitylabs.datadoghq.com/articles/i-spy-escalating-to-entra-id-global-admin/
1•kidbomb•32m ago•0 comments

CBEX crypto scam: AI-hyped Ponzi scheme defrauds African investors

https://techxplore.com/news/2025-07-cbex-crypto-scam-ai-hyped.html
1•PaulHoule•32m ago•0 comments

Free App

https://github.com/steenn30/tbbtoo
1•kanyemthfknwest•33m ago•1 comments

How Are Students Using AI?

https://www.chronicle.com/article/how-are-students-really-using-ai
1•Brajeshwar•33m ago•0 comments

The Smoot – How an MIT prank became a lasting unit of measurement

https://www.theregister.com/2025/07/18/smoot_mit_measurement/
1•Brajeshwar•34m ago•0 comments

Pirate Site Blockades Get Judicial Scrutiny in Germany, but No Transparency?

https://torrentfreak.com/pirate-site-blockades-get-judicial-scrutiny-in-germany-but-no-transparency/
1•gslin•35m ago•0 comments

Science Explains Why People Get More Carsick in EVs

https://www.thedrive.com/news/science-finally-explains-why-people-get-more-carsick-in-evs
2•cf100clunk•35m ago•0 comments

The landlord gutting America’s hospitals

https://www.motherjones.com/politics/2025/07/the-landlord-gutting-americas-hospitals/
10•hhs•37m ago•0 comments

PostgreSQL CTEs and Window Functions: Advanced Query Techniques

https://medium.com/@rohansodha10/postgresql-ctes-window-functions-advanced-query-techniques-0acdaef06f4f
1•thunderbong•37m ago•0 comments

The smooth resize test (2019)

https://raphlinus.github.io/rust/gui/2019/06/21/smooth-resize-test.html
1•PKop•39m ago•0 comments

Show HN: Privacy-first AI document processing

https://tygra.ai/
1•tygra•41m ago•0 comments

After a partly successful test flight, European firm eyes space station mission

https://arstechnica.com/space/2025/07/european-firm-has-an-ambitious-plan-to-dock-with-the-space-station-in-2028/
1•saubeidl•42m ago•0 comments

The end of leisure - What does it mean to 'feel productive'?

https://helenaaeberli.substack.com/p/the-end-of-leisure
2•XzetaU8•43m ago•0 comments

New colors without shooting lasers into your eyes

https://dynomight.net/colors/
1•leephillips•45m ago•0 comments

Tell HN: It feels weird and but oddly good

1•stavarotti•48m ago•1 comments