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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
486•klaussilveira•7h ago•130 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
824•xnx•13h ago•495 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
47•matheusalmeida•1d ago•5 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
163•isitcontent•8h ago•18 comments

A century of hair samples proves leaded gas ban worked

https://arstechnica.com/science/2026/02/a-century-of-hair-samples-proves-leaded-gas-ban-worked/
103•jnord•3d ago•14 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
159•dmpetrov•8h ago•72 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
56•quibono•4d ago•9 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
267•vecti•10h ago•126 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
334•aktau•14h ago•161 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
216•eljojo•10h ago•136 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
330•ostacke•13h ago•87 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
31•kmm•4d ago•1 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
417•todsacerdoti•15h ago•220 comments

Show HN: ARM64 Android Dev Kit

https://github.com/denuoweb/ARM64-ADK
8•denuoweb•1d ago•0 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
8•romes•4d ago•1 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
348•lstoll•14h ago•245 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
55•phreda4•7h ago•9 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
205•i5heu•10h ago•149 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
117•vmatsiiako•12h ago•42 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
30•gfortaine•5h ago•4 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
155•limoce•3d ago•79 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
254•surprisetalk•3d ago•32 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1008•cdrnsf•17h ago•421 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
50•rescrv•15h ago•17 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
11•gmays•3h ago•2 comments

I'm going to cure my girlfriend's brain tumor

https://andrewjrod.substack.com/p/im-going-to-cure-my-girlfriends-brain
82•ray__•4h ago•40 comments

Evaluating and mitigating the growing risk of LLM-discovered 0-days

https://red.anthropic.com/2026/zero-days/
41•lebovic•1d ago•12 comments

Show HN: Smooth CLI – Token-efficient browser for AI agents

https://docs.smooth.sh/cli/overview
78•antves•1d ago•59 comments

How virtual textures work

https://www.shlom.dev/articles/how-virtual-textures-really-work/
32•betamark•15h ago•28 comments

Show HN: Slack CLI for Agents

https://github.com/stablyai/agent-slack
41•nwparker•1d ago•11 comments
Open in hackernews

Rare X-ray images of a 4.5-ton satellite that returned intact from space

https://www.empa.ch/web/s604/eureca-satellit-mit-roentgenmethoden-untersucht
112•giuliomagnifico•2mo ago

Comments

jagged-chisel•2mo ago
This kind of reads like an investigation of some unknown object. Seems like the intent is to better understand how the thing was affected during use and on re-entry and improve future reusable craft.
permo-w•2mo ago
also the title would do well to indicate that the satellite was returned and it did not return itself
dreamcompiler•2mo ago
It didn't reenter and somehow fail to burn up. It was captured from orbit and brought back by the space shuttle.

Still a very interesting analysis.

wkat4242•2mo ago
That's one capability that was lost with the space shuttle. There's nothing remaining nor planned that can bring something that size back from LEO.

I feel like materials science could learn a lot more about radiation embrittlement and high energy micro impacts.

The space shuttle is often regarded as a huge mistake and in many ways (reusability especially, it was more like rebuildability :) ) it was, but it was still hell of a machine.

femto•2mo ago
> That's one capability that was lost with the space shuttle. There's nothing remaining nor planned that can bring something that size back from LEO.

Surely the X-37 could be used to bring a satellite down, even if it's not an acknowledged capability?

NooneAtAll3•2mo ago
only a very tiny one at most
mr_toad•2mo ago
The X-37 is tiny, it’s only 5 tonnes itself. But one of the uses is probably to bring back smaller satellites to determine how long term exposure in space has affected them.
kjs3•2mo ago
I feel like materials science could learn a lot more about radiation embrittlement and high energy micro impacts.

They do those experiments on the ISS: https://www.nasa.gov/materials-international-space-station-e...

ACCount37•2mo ago
Starship might be capable, once it gets the "chomper" cargo bay. Would require custom hardware though.
wkat4242•2mo ago
Yeah the cool thing about the shuttle is that it also was a mini space station. Astronauts could actually live in it for a while. Which came in handy building the ISS I'm sure. Robotics weren't what they are now so it was a lot of hand work.
gblargg•2mo ago
Even the article's author seems confused:

> one of the very few satellites to have returned from its mission in space intact

This makes it sounds like it was due to great luck rather than human decision. It's in fact one of the very few satellites that it was decided to have retrieved (intact) from space (at significant expense) rather than letting it deorbit and burn up on re-entry.

shevy-java•2mo ago
Guys,

I watched all the alien movies.

We should not trust those things that come from outside planet Earth ...

danparsonson•2mo ago
Good reason to x-ray it!
SideburnsOfDoom•2mo ago
Space is vast, and we conflate very different parts of it.

Other solar systems and their hypothetical risks are not the same as as cislunar space or LEO.

icefo•2mo ago
Please this is not reddit
nkrisc•2mo ago
What are you talking about? This was in LEO for only a year and was returned to Earth by space shuttle Endeavor - over 30 years ago.

I assume you read the article, so I’ll suggest re-reading the second paragraph more closely.

azurezyq•2mo ago
I would highly recommend reading the materials about https://en.wikipedia.org/wiki/Long_Duration_Exposure_Facilit..., which is dedicated for material exposure research in the space.
busymom0•2mo ago
This is very interesting:

> The Space Exposed Experiment Developed for Students (SEEDS) allowed students the opportunity to grow control and experimental tomato seeds that had been exposed on LDEF comparing and reporting the results. 12.5 million seeds were flown, and students from elementary to graduate school returned 8000 reports to NASA. The L.A. Times misreported that a DNA mutation from space exposure could yield a poisonous fruit. Whilst incorrect, the report served to raise awareness of the experiment and generate discussion.[17] Space seeds germinated sooner and grew faster than the control seeds. They were also more porous than terrestrial seeds.

Wonder why?

bradneuberg•2mo ago
Interesting study but it sounds like the satellite was captured in the early 1990s, exhibited in a museum for a decade or two, and only x-rayed in 2016. I’m not sure if the defects they found can be attributed to the space environment or wear and tear from sitting in a museum.