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

https://openciv3.org/
451•klaussilveira•6h ago•109 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
791•xnx•12h ago•481 comments

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

https://github.com/valdanylchuk/breezydemo
152•isitcontent•6h ago•15 comments

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

https://github.com/pydantic/monty
145•dmpetrov•7h ago•63 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
19•matheusalmeida•1d ago•0 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
46•quibono•4d ago•4 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/
84•jnord•3d ago•8 comments

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

https://vecti.com
257•vecti•8h ago•120 comments

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

https://eljojo.github.io/rememory/
192•eljojo•9h ago•127 comments

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

https://github.com/microsoft/litebox
321•aktau•13h ago•155 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
317•ostacke•12h ago•85 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
403•todsacerdoti•14h ago•218 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
328•lstoll•13h ago•237 comments

PC Floppy Copy Protection: Vault Prolok

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

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

https://github.com/phreda4/r3
50•phreda4•6h ago•8 comments

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

https://infisical.com/blog/devops-to-solutions-engineering
110•vmatsiiako•11h ago•34 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
189•i5heu•9h ago•132 comments

Learning from context is harder than we thought

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

Make Trust Irrelevant: A Gamer's Take on Agentic AI Safety

https://github.com/Deso-PK/make-trust-irrelevant
7•DesoPK•1h ago•3 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
240•surprisetalk•3d ago•31 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/
985•cdrnsf•16h ago•417 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
21•gfortaine•4h ago•2 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
43•rescrv•14h ago•17 comments

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

https://andrewjrod.substack.com/p/im-going-to-cure-my-girlfriends-brain
58•ray__•3h ago•14 comments

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

https://red.anthropic.com/2026/zero-days/
36•lebovic•1d ago•11 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...
5•gmays•1h ago•0 comments

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

https://docs.smooth.sh/cli/overview
77•antves•1d ago•57 comments

Show HN: Slack CLI for Agents

https://github.com/stablyai/agent-slack
40•nwparker•1d ago•10 comments

The Oklahoma Architect Who Turned Kitsch into Art

https://www.bloomberg.com/news/features/2026-01-31/oklahoma-architect-bruce-goff-s-wild-home-desi...
20•MarlonPro•3d ago•4 comments

How virtual textures work

https://www.shlom.dev/articles/how-virtual-textures-really-work/
28•betamark•13h ago•23 comments
Open in hackernews

Rcyl – a recycled plastic urban bike

https://rcyl.bike/en/the-bike/
33•smartmic•3mo ago
https://web.archive.org/web/20250912174820/https://rcyl.bike...

Comments

daemonologist•3mo ago
https://web.archive.org/web/20250912174820/https://rcyl.bike...
dang•3mo ago
Added to toptext. Thanks!
daemonologist•3mo ago
A nearly all (">90%") plastic bike is interesting, and I guess if you're a plastics company that wants to create a bike it makes sense, but the end product does not seem very compelling to me. 17 kg, 1200 EUR, one size, proprietary parts, and only 50% recycled. A comparable aluminum bike beats it in every metric except maybe fatigue life(?).
avtolik•3mo ago
My first bike bought with my first salaries (about 2-3 months) just turned 20 years old. It's a basic aluminum hardtail MTB. Still going strong - I do about 2-3k kms per year.
alright2565•3mo ago
Pretty much. I thought that maybe this is an electric bike, in which case the weight might be OK, but no, this is unusable anywhere with hills.

As a quick reminder, metals can be recycled indefinitely. Plastic cannot, you always have to include some virgin material.

userbinator•3mo ago
You can recycle via depolymerization (see the various plastic-to-oil conversion refineries), although that's a more expensive process than simply melting and recasting.
rz2k•3mo ago
Furthermore, aluminum can be recycled with a lot less greenwashing required.
hamdingers•3mo ago
Post-consumer aluminum has been in common use for wheels for ages, and some major brands (like Trek) are also transitioning their aluminum frames to use recycled material.
mtmail•3mo ago
Reminds me of the hydrogen-powered bike from 2015, which totally made sense if your company is also a leader in hydrogen products. https://www.bikeradar.com/news/this-e-bike-is-powered-by-hyd...

"A regular e-bike battery can take several hours to charge completely, but the H2’s hydrogen cylinder requires just six minutes at a hydrogen filling station." Of course the company wanted to run the filling stations.

nine_k•3mo ago
If we take this as an experiment, it's a useful experiment, showing how expensive and hard this path is. A negative result is a valuable result.
chneu•3mo ago
Plastic recycling is dumb. All it does is keep plastics in the environment and encourages people to use more plastic.

This is just a dumb token gesture to get people to buy a product that doesn't need to exist. This solves a problem nobody has.

simjnd•3mo ago
It's a terrible bicycle. If it was extremely affordable because it's mostly recycled plastic acquired for cheap, then it would make sense as a product but the 1200 EUR price tag is absolutely demented.
taitems•3mo ago
Their poor little servers aren't coping well with the attention. The worst is a 1,004kb image so it's not excessively large.
mchanson•3mo ago
Weight, price, drivetrain all are terrible as others have said you would be much better off spending much less on a simple al bike.
bn-l•3mo ago
Recycled plastic concentrates phthalates and other toxins. The best place for plastic is modern landfill.
userbinator•3mo ago
That looks like HDPE, which normally requires no plasticisers. Better learn some chemistry before spouting hysterical nonsense.

Plasticised PVC, which is where phthalates are used, is not suitable for structural applications like this.

Edit: care to refute? Or do you just want to parrot ignorant talking points without thought.

chneu•3mo ago
Idk about the chemical thing but yeah, throw plastic away.

Recycling plastic is just greenwashing to get more people to use more plastic.

Throw plastic in the trash where it belongs. That's where it's gonna wind up anyway. At least this way you know where it's going instead of thinking it's going off to be magically recycled into magic pixie dust that saves the planet.

lillecarl•3mo ago
You can also burn it for energy, this is what Sweden (and probably our neighbors) do. Yet we're at 0.7x global average CO2 per capita.

https://en.wikipedia.org/wiki/List_of_countries_by_carbon_di...

Do more with the shit you have is a good idea, this bike isn't.

bn-l•3mo ago
Why not sequester that carbon in a beautiful landfill? Let it rest. Peacefully.
rubyn00bie•3mo ago
I don’t get this. Marketing this as an urban bike makes no sense. It’s heavy, looks like it’ll be awful to maintain because so much is custom, and it’s relatively expensive. I rode fixed gears for years because they’re light, easy to carry up stairs, and can take being knocked about or banged up by other cyclists locking their bikes up next to one.

Even something of equal weight like the legendary Surly Long-Haul Trucker is going to last longer and be more practical in every possible application. Maybe if you live somewhere costal and salt will corrode the steel or something it makes sense? I have a hard time believing this would fair better though.

gpapilion•3mo ago
I would think this is for rental fleets or bike share. The weight and design would seem to make sense for that. Though the single speed seems like and odd choice for that.
KomoD•3mo ago
I'm gonna be honest, it's really ugly and expensive. €1200, singlespeed and weighs 17 KG...

Also if you trade it in when it breaks, they only give you €50?

hamdingers•3mo ago
Every "urban" city has at least one bicycle co-op in it full of used bicycles for sale that are lighter, easier to repair, fit better, far cheaper, and best of all already exist and do not need to be manufactured.

Reduce and reuse come before recycle for a reason. This is greenwashing, not environmentalism.

mauvehaus•3mo ago
Can confirm:

Cleveland, OH: Ohio City Bike Co-op https://ohio-city-bicycle-co-op.shoplightspeed.com/

Boston, MA: Bikes Not Bombs https://bikesnotbombs.org/

Somerville, MA: Somerville Bike Kitchen https://somervillebikekitchen.org/

Burlington VT: Old Spokes Home https://oldspokeshome.com

And many, many more.

pimlottc•3mo ago
Chicago, IL: Working Bikes https://workingbikes.org/
grues-dinner•3mo ago
Any consumer trinket that is made from recycled plastic is more or less pointless. At most, you get one more cycle out of that little bit of plastic. Better than nothing, sure, I guess, as long as your thing actually needed to be plastic. Worth all the back-pats and preening website copy? No.

There are practical ways to use less plastic (or any material really):

* Don't sell disposable shit

* Don't sell fragile shit that breaks quickly in the first place

* This often means more things out of metal, or at least thicker plastic. It may mean you need to use a screw to close the case rather than welding it shut or using plastic tabs that snap

* Use materials and designs can can be repaired using standard parts and materials

* Provide spares for less than the cost of replacing the whole damn thing

* And on and on

If your aim is to sequestrate existing plastic to keep it out of the environment, burn it, landfill it or maybe make it into bulk building materials and hide safely it in a non-wearing building (i.e. not a road surface) for 100 years. Putting it back out into the world in a less recyclable form (a common example: cheap and shit fleece jackets proudly made from 50 bottles or whatever - now that's microplastic fibres and definitely will not be recycled ever again) just defers it a couple of years. Especially if the thing you made from plastic didn't even need to be plastic.

dmurray•3mo ago
Building the wheels and frame out of plastic is a fun gimmick, but they're selling this as a low maintenance option that "doesn't rust or require lubrication".

If they really have an all-plastic drivetrain that competes with carbon steel, that seems like a wonderful advance in materials science or mechanical engineering and we'll soon be seeing plenty more applications of this miracle material.

alright2565•3mo ago
It has a Gates belt drive, which has been getting pretty popular with electric bikes due to the very low maintenance requirements.
cluckindan•3mo ago
Great stuff, cities definitely need more microplastics.
heybales•3mo ago
I grind up my 3d printing waste and sprinkle it out my window as I drive down the road, so I got you covered.
yourusername•3mo ago
In addition to being heavy and expensive for the specs it also appears to have terrible aero with the fat frame and triple handlebar supports.
walrusted•3mo ago
we need to stop pretending that this sustainable-washing shit is sustainable. this does not solve "the bicycle". its just another bicycle. not even a better one- its worse. why? plastic is the new asbestos. it drips microplastic everywhere. we dont recycle asbestos into bicycles for a reason. contain or plastic brain