frontpage.
newsnewestaskshowjobs

Made with ♥ by @iamnishanth

Open Source @Github

fp.

Ask HN: Do we need "metadata in source code" syntax that LLMs will never delete?

1•andrewstuart•3m ago•1 comments

Pentagon cutting ties w/ "woke" Harvard, ending military training & fellowships

https://www.cbsnews.com/news/pentagon-says-its-cutting-ties-with-woke-harvard-discontinuing-milit...
2•alephnerd•6m ago•1 comments

Can Quantum-Mechanical Description of Physical Reality Be Considered Complete? [pdf]

https://cds.cern.ch/record/405662/files/PhysRev.47.777.pdf
1•northlondoner•6m ago•1 comments

Kessler Syndrome Has Started [video]

https://www.tiktok.com/@cjtrowbridge/video/7602634355160206623
1•pbradv•9m ago•0 comments

Complex Heterodynes Explained

https://tomverbeure.github.io/2026/02/07/Complex-Heterodyne.html
3•hasheddan•9m ago•0 comments

EVs Are a Failed Experiment

https://spectator.org/evs-are-a-failed-experiment/
2•ArtemZ•21m ago•3 comments

MemAlign: Building Better LLM Judges from Human Feedback with Scalable Memory

https://www.databricks.com/blog/memalign-building-better-llm-judges-human-feedback-scalable-memory
1•superchink•22m ago•0 comments

CCC (Claude's C Compiler) on Compiler Explorer

https://godbolt.org/z/asjc13sa6
2•LiamPowell•23m ago•0 comments

Homeland Security Spying on Reddit Users

https://www.kenklippenstein.com/p/homeland-security-spies-on-reddit
3•duxup•26m ago•0 comments

Actors with Tokio (2021)

https://ryhl.io/blog/actors-with-tokio/
1•vinhnx•27m ago•0 comments

Can graph neural networks for biology realistically run on edge devices?

https://doi.org/10.21203/rs.3.rs-8645211/v1
1•swapinvidya•40m ago•1 comments

Deeper into the shareing of one air conditioner for 2 rooms

1•ozzysnaps•41m ago•0 comments

Weatherman introduces fruit-based authentication system to combat deep fakes

https://www.youtube.com/watch?v=5HVbZwJ9gPE
3•savrajsingh•42m ago•0 comments

Why Embedded Models Must Hallucinate: A Boundary Theory (RCC)

http://www.effacermonexistence.com/rcc-hn-1-1
1•formerOpenAI•44m ago•2 comments

A Curated List of ML System Design Case Studies

https://github.com/Engineer1999/A-Curated-List-of-ML-System-Design-Case-Studies
3•tejonutella•48m ago•0 comments

Pony Alpha: New free 200K context model for coding, reasoning and roleplay

https://ponyalpha.pro
1•qzcanoe•52m ago•1 comments

Show HN: Tunbot – Discord bot for temporary Cloudflare tunnels behind CGNAT

https://github.com/Goofygiraffe06/tunbot
2•g1raffe•55m ago•0 comments

Open Problems in Mechanistic Interpretability

https://arxiv.org/abs/2501.16496
2•vinhnx•1h ago•0 comments

Bye Bye Humanity: The Potential AMOC Collapse

https://thatjoescott.com/2026/02/03/bye-bye-humanity-the-potential-amoc-collapse/
3•rolph•1h ago•0 comments

Dexter: Claude-Code-Style Agent for Financial Statements and Valuation

https://github.com/virattt/dexter
1•Lwrless•1h ago•0 comments

Digital Iris [video]

https://www.youtube.com/watch?v=Kg_2MAgS_pE
1•vermilingua•1h ago•0 comments

Essential CDN: The CDN that lets you do more than JavaScript

https://essentialcdn.fluidity.workers.dev/
1•telui•1h ago•1 comments

They Hijacked Our Tech [video]

https://www.youtube.com/watch?v=-nJM5HvnT5k
2•cedel2k1•1h ago•0 comments

Vouch

https://twitter.com/mitchellh/status/2020252149117313349
37•chwtutha•1h ago•6 comments

HRL Labs in Malibu laying off 1/3 of their workforce

https://www.dailynews.com/2026/02/06/hrl-labs-cuts-376-jobs-in-malibu-after-losing-government-work/
4•osnium123•1h ago•1 comments

Show HN: High-performance bidirectional list for React, React Native, and Vue

https://suhaotian.github.io/broad-infinite-list/
2•jeremy_su•1h ago•0 comments

Show HN: I built a Mac screen recorder Recap.Studio

https://recap.studio/
1•fx31xo•1h ago•1 comments

Ask HN: Codex 5.3 broke toolcalls? Opus 4.6 ignores instructions?

1•kachapopopow•1h ago•0 comments

Vectors and HNSW for Dummies

https://anvitra.ai/blog/vectors-and-hnsw/
1•melvinodsa•1h ago•0 comments

Sanskrit AI beats CleanRL SOTA by 125%

https://huggingface.co/ParamTatva/sanskrit-ppo-hopper-v5/blob/main/docs/blog.md
1•prabhatkr•1h ago•1 comments
Open in hackernews

New Process Uses Microbes to Create Valuable Materials from Urine

https://newscenter.lbl.gov/2025/06/17/new-process-uses-microbes-to-create-valuable-materials-from-urine/
52•gmays•7mo ago

Comments

LargoLasskhyfv•7mo ago
https://www.nature.com/articles/s41467-025-59416-8#Abs1

The valuable materials are artificial bone made from hydroxyapatite produced by yeast, used in bone surgery and dentistry.

kjkjadksj•7mo ago
Now imagine how big the market would be if people could actually get cosmetic dental work covered under insurance
LargoLasskhyfv•7mo ago
There is no need to imagine that. It depends on the country, and your insurance. I've experienced it, not personally, because no need so far (phew!). But when I grew up that was free, for all. Like glasses, too.

Still don't really care, because now it would be covered by my private insurance. If not they'd get sued into oblivion really fast, even if I would be incapacitated somehow.

schiffern•7mo ago
Also check out the CodysLab version of biological urine reuse (aka the giant aquarium filter):

https://www.youtube.com/watch?v=fhYW0QVS408

Great channel. Quite a shame to hear about Cody's burnout after constant issues getting paid by YouTube, and apparently dating problems with the stigma associated with "youtuber."

analog31•7mo ago
Not the first time that urine has been used as a raw material at scale

https://www.yorkshirepost.co.uk/whats-on/arts-and-entertainm...

ChuckMcM•7mo ago
This is an interesting paper. I had read about recycling cow urine in dairies[1] and I wonder if the yeast would be able to make hydroxypatite out of it. At the time I came across this paper I was looking at people creating financial incentives to produce ammonia (and ammonium nitrate) at scale for farming. We import a bunch of it[2] and making it locally would be a win/win.

[1] https://www.sciencedirect.com/science/article/abs/pii/B97801...

[2] https://wits.worldbank.org/trade/comtrade/en/country/USA/yea...

icoder•7mo ago
Here in the Netherlands the impact of Nitrogen coming from cattle excretions (mostly through ammonia I believe) is paralizing the entire country (due to the impact on the environment, it's now blocking the building of - very much needed - housing. So there could be a win/win/win/win there.
throwaway77385•7mo ago
Interesting. First time I've heard of this outside the UK. In my local area, there's a near total moratorium on new-builds. The reasons are complex, but it's a mixture of agriculture having poisoned all the rivers, housing which is not connected to mains waste water (and people just not maintaining their private waste water systems, which are often just tanks of excrement mixed with chemicals, overflowing into nature) and, even if houses connected to mains, those constantly overflow into storm drains and make the rivers and coasts dangerous to swim in. All of that while it's completely clear that if we need one thing, it's more housing. Quite a predicament we find ourselves in.
amy214•7mo ago
California is like this, for different reasons. Mostly the leaders think nature > humanity so the more they cap the knees of civilization, more for nature, and that's a good and meaningful legacy in their minds. Of course this is a politically dangerous thing to speak up about publicly, so it's more along the lines of "uhhh we need to make sure the house you build is safe, so you need 50,000 pages describing how safe it is, must be evaluated by an army of Phds, and rejections take 5 years"
pstuart•7mo ago
There are startups doing it directly from air (with solar power): e.g., https://www.talusag.com/

There's lots of exciting development in this space and I hope they can thrive in a world owned by fossil fuel companies.

interestica•7mo ago
Check out the Rich Earth Institute in Vermont. They're doing cool experimentation and research.

https://richearthinstitute.org/

thayne•7mo ago
Cool

But is there enough demand for this to make it economical? I would guess the cost of material would be a very small percentage of the cost pf operations that use hydroxyapatite.

WalterBright•7mo ago
Urine has historically been used to create gunpowder.

The Romans used urine as laundry detergent.

schiffern•7mo ago
If the Romans had only known, they could've used chewed watermelon seeds which contain urease. Adding this catalyst greatly speeds up the volatilization reaction from 3-5 weeks to overnight,[0] eliminating the need for Roman laundries to buffer weeks worth of urine as they wait for it to turn into ammonia.

There's a reason why Roman laundries were usually located just outside the city, ideally on the downwind side...

[0] https://www.researchgate.net/publication/291165299_Citrullus...

Scoundreller•7mo ago
Even a single seed did the job per that study.

Only problem was that watermelon didn’t hit the European side of the empire until the endish

aitchnyu•7mo ago
A city which had shared toilet sponges would be known for being stinky by lots of authors.
jrflowers•7mo ago
Finally, a way to turn urine into bones. I’ve been saying “we need to find a way to turn urine into bones” for years and people told me that it couldn’t be done
v3ss0n•7mo ago
So as in the the acient alchemy wisdom describe in Emerald Tablet