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

https://openciv3.org/
623•klaussilveira•12h ago•182 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
924•xnx•18h ago•548 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
32•helloplanets•4d ago•24 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
109•matheusalmeida•1d ago•27 comments

Jeffrey Snover: "Welcome to the Room"

https://www.jsnover.com/blog/2026/02/01/welcome-to-the-room/
9•kaonwarb•3d ago•7 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
40•videotopia•4d ago•1 comments

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

https://github.com/valdanylchuk/breezydemo
219•isitcontent•12h ago•25 comments

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

https://github.com/pydantic/monty
210•dmpetrov•13h ago•103 comments

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

https://vecti.com
320•vecti•15h ago•142 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
369•ostacke•18h ago•94 comments

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

https://github.com/microsoft/litebox
357•aktau•19h ago•181 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
477•todsacerdoti•20h ago•232 comments

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

https://eljojo.github.io/rememory/
272•eljojo•15h ago•160 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
402•lstoll•19h ago•271 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
85•quibono•4d ago•20 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
14•jesperordrup•2h ago•6 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
25•romes•4d ago•3 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
56•kmm•5d ago•3 comments

Was Benoit Mandelbrot a hedgehog or a fox?

https://arxiv.org/abs/2602.01122
12•bikenaga•3d ago•2 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
243•i5heu•15h ago•188 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
52•gfortaine•10h ago•21 comments

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

https://infisical.com/blog/devops-to-solutions-engineering
139•vmatsiiako•17h ago•62 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
280•surprisetalk•3d ago•37 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/
1058•cdrnsf•22h ago•433 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
131•SerCe•8h ago•117 comments

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

https://github.com/phreda4/r3
70•phreda4•12h ago•14 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...
28•gmays•7h ago•10 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
176•limoce•3d ago•96 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
63•rescrv•20h ago•22 comments

WebView performance significantly slower than PWA

https://issues.chromium.org/issues/40817676
32•denysonique•9h ago•6 comments
Open in hackernews

Startup just hit a big milestone for green steel production

https://www.technologyreview.com/2025/03/12/1113130/green-steel-boston-metal/
29•ohjeez•6mo ago

Comments

bell-cot•6mo ago
> Boston Metal uses electricity in a process called molten oxide electrolysis (MOE). Iron ore gets loaded into a reactor, mixed with other ingredients, and then electricity is run through it, heating the mixture to around 1,600 °C (2,900 °F) and driving the reactions needed to make iron. That iron can then be turned into steel.

Big picture - it's like smelting Aluminum, but with Fe instead of Al.* And about 600 °C (1,000 °F) hotter.

On the plus side, Fe is not nearly as fond of oxygen as Al is - greatly reducing the electrical energy needed to reduce the ore to metal.

> The next step is to build an even bigger system, Rauwerdink says—something that won’t fit in the Boston facility. While a reactor of the current size can make a ton or two of material in about a month, the truly industrial-scale equipment will make that amount of metal in about a day. That demonstration plant should come online in late 2026 and begin operation in 2027, he says. Ultimately, the company hopes to license its technology to steelmakers.

From a quick search, it looks like steel is worth ~$500/ton. So calling a 1-2 ton/day system "truly industrial-scale" might be correct language among metallurgical researchers...but it's probably orders of magnitude smaller than you'd need for an economically viable facility.

Maybe start with trying to manufacture some very expensive, low-volume specialty steels?

*EDIT: The usual https://en.wikipedia.org/wiki/Hall-H%C3%A9roult_process , for smelting aluminum, does emit a fair amount of CO2 - because [messy details]. The article basically says nothing about the actual process they're using for iron, ruling out a close comparison.

manarth•6mo ago
By comparison, a blast furnace can produce 4000+ tons a day.
tuatoru•6mo ago
This is reducing iron ore to iron metal. It's making the main input feedstock for all kinds of steels. So yeah, it might be viable as the feedstock for boutique steelmakers that want to claim to be green. But it's going to have to work eventually if we want to get to net zero, or anywhere close.

Iron refining is done with coke, coal, and limestone, calcium carbonate. It produces more carbon than the second step, making steel from the iron metal.

bell-cot•6mo ago
Yeah - it's far more complex, and iron != steel.

(The article talks almost entirely about steel (vs. iron), but is too detail-fuzzed to trust that.)

I made very charitable assumption from this:

> Ultimately, the company hopes to license its technology to steelmakers.

Actual steelmakers know all the myriad costs and details and steps required to make steel - and would probably prefer that any radical new process replace as many of those step and details as possible, at an economic cost.

samuli•6mo ago
SSAB is completing their new 190-tonne alternate current electric arc furnace by end of next year, which should yield about 500-800k carbon free tonnes of steel plate and coil per year.

They plan to convert all their Nordic plants to carbon free by 2030 and have some plants also in the North America.

https://eurometal.net/ssab-starts-construction-of-eaf-at-oxe... https://www.ssab.com/en/news/2025/03/new-electric-arc-furnac...

tuatoru•6mo ago
Different thing. Electric arc furnaces are old technology.

What is new here is direct reduction of iron ore to iron metal, electrolytically. It makes the input feedstock for your EAFs.

Smelting has always been the most carbon-intensive part of steelmaking.

defrost•6mo ago
There's also what's called an electric smelt furnace, that has a couple of variations, currently being trialed by two global scale producers at bigger than MIT lab scale, but less than production:

ESF- https://www.energyinnovation.net.au/article/the-electric-sme...

Fortescue- https://metals.fortescue.com/en/our-projects/green-metal-pro...

BlueScope, BHP and Rio Tinto- https://www.riotinto.com/en/news/releases/2024/bluescope-bhp...

biohcacker84•6mo ago
Carbon neutral as long as your electricity is carbon neutral.

Also many steel mills are built so that they can switch between energy source, oil, coal, gas, which ever happens to be cheapest currently.

It's a commodity business, price is almost all that matters. And with the current US Administration the days of carbon subsidies might be numbered.

willtemperley•6mo ago
With this approach, a waste heat energy recovery system could reuse a significant percentage of the energy.