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StreetComplete: Fixing OpenStreetMap, one tiny quest at a time

https://streetcomplete.app/
289•kls0e•3h ago•58 comments

Microsoft Fire IdTech Team at Id Software

https://gamefromscratch.com/microsoft-fire-idtech-team-at-id-software/
53•bauc•23m ago•10 comments

A better way to tie your gym shorts. (Or any drawstring) [video]

https://www.youtube.com/watch?v=3R0Lp86GEBk
224•surprisetalk•3h ago•90 comments

98% Isn't Much

https://whynothugo.nl/journal/2026/07/03/98-isnt-very-much/
283•speckx•3h ago•213 comments

Europe's company websites are mostly served by US vendors

https://ciphercue.com/blog/european-web-hosting-vendor-share-2026
166•adulion•3h ago•124 comments

Better Auth is joining Vercel

https://better-auth.com/blog/better-auth-joins-vercel
8•sync•4m ago•0 comments

Chat Control passed first round in EU Parliament

https://www.heise.de/en/news/Showdown-in-Strasbourg-The-unexpected-return-of-Chat-Control-1-0-113...
85•miroljub•41m ago•29 comments

Top researchers leave USA for the Netherlands (in Dutch)

https://www.nwo.nl/nieuws/eerste-internationale-wetenschappers-via-het-tulp-fonds-naar-nederland
237•28304283409234•5h ago•186 comments

C++ Details of Asymmetric Fences

https://nekrozqliphort.github.io/posts/membarrier/
32•anon_farmer•3d ago•1 comments

9 Mothers (YC P26) Is Hiring in Austin, TX

https://9mothers.com/careers
1•ukd1•3h ago

Show HN: PostgreSQL performance and cost across 23 EC2 instance types

https://postgres.saneengineer.com
29•anivan_•3h ago•0 comments

OpenWrt One – Open Hardware Router

https://openwrt.org/toh/openwrt/one
761•peter_d_sherman•21h ago•285 comments

CoMaps – FOSS Offline Maps

https://www.comaps.app/
711•basilikum•21h ago•174 comments

The Revenge of the Philosophy Majors

https://www.nytimes.com/2026/07/05/business/philosophy-majors-ai-jobs.html
46•benbreen•1h ago•48 comments

The Family Keeping Watch over a 52-Year-Old Pot of Soup

https://www.wsj.com/arts-culture/food-cooking/the-family-keeping-watch-over-a-52-year-old-pot-of-...
40•petethomas•6d ago•33 comments

How to sequence your own DNA at home

https://bradleywoolf.com/links-1/sequencing-my-own-dna-at-home
331•bilsbie•15h ago•124 comments

Small AI Models Gain Traction In places with unreliable networks

https://spectrum.ieee.org/small-language-models-ai-pharmaceuticals
234•sscaryterry•15h ago•70 comments

Historic Photos of NASA's Cavernous Wind Tunnels

https://www.theatlantic.com/photo/2018/05/historic-photos-of-nasas-cavernous-wind-tunnels/560660/
73•ohjeez•2d ago•20 comments

GLM 5.2 and the coming AI margin collapse

https://martinalderson.com/posts/the-upcoming-ai-margin-collapse-part-1-glm-5-2/
614•martinald•19h ago•396 comments

The Art of Computer Programming by Donald E. Knuth

https://www-cs-faculty.stanford.edu/~knuth/taocp.html
132•archargelod•10h ago•35 comments

Ask HN: Where are the good search engines for mathematical formulas?

19•lo0dot0•2d ago•6 comments

But Nothing Has Changed on Our Side

https://cacm.acm.org/blogcacm/but-nothing-has-changed-on-our-side/
4•adunk•3d ago•1 comments

Microsoft Can Track Users via a Windows Device ID

https://www.pcmag.com/news/a-hackers-arrest-reveals-microsoft-can-track-users-via-a-windows-device
259•ifh-hn•7h ago•108 comments

Fable turned reMarkable into Tom Riddle's diary from Harry Potter

https://github.com/MaximeRivest/Riddle
586•modinfo•16h ago•357 comments

Dolosse – a South African invention used over the world

https://thisbugslife.com/2021/11/21/dolosse-a-south-african-invention-used-over-the-world/
110•andsoitis•3d ago•27 comments

Dua Lipa opens library for banned and censored books in Portugal

https://www.euronews.com/culture/2026/06/29/dua-lipa-opens-library-for-banned-and-censored-books-...
165•pax•3h ago•150 comments

Ternlight – 7 MB embedding model that runs in browser (WASM)

https://ternlight-demo.vercel.app/
296•soycaporal•16h ago•60 comments

A global workspace in language models

https://www.anthropic.com/research/global-workspace
426•in-silico•22h ago•168 comments

Resetting Xbox

https://news.xbox.com/en-us/2026/07/06/resetting-xbox/
705•dijksterhuis•1d ago•841 comments

In Praise of Observational Evidence

https://asteriskmag.com/issues/14/in-praise-of-observational-evidence
65•fi-le•6d ago•33 comments
Open in hackernews

Sodium-ion "salt" batteries will revolutionize electric-vehicle and grid storage

https://www.newscientist.com/article/2532997-salt-batteries-are-about-to-shake-up-evs-and-grid-storage/
28•ck2•1h ago

Comments

ck2•1h ago
note sodium-ion is no longer two or three times the weight of lithium-ion, there is only a +33% penalty

apparently the problem is there is not yet enough volume in production to compete on price, which I thought was the whole point?

> sodium-ion specs have improved to the point that the technology could break into the general EV market. A recent study by Moritz Schütte at Aachen University in Germany and his colleagues found that a sodium-ion battery by the manufacturer Hina rivals Tesla’s lithium-ion batteries on most parameters, although it would still be a third heavier

> But CATL claims its sodium-ion battery has an energy density of 175 watt-hours per kilogram, which can compete with the lithium-iron-phosphate batteries in low-cost models from Tesla and others. And while sodium-ion batteries still haven’t quite beaten lithium batteries on price, that could change as they expand, according to Schütte

> sodium ions generate less heat in electrochemical reactions, reducing fire risk, so less money can be spent on cooling. They also form weaker bonds with the electrolyte, so they don’t slow down as much in the cold

jtr1•56m ago
I do wonder if there will be a convergence between sodium-ion battery architectures and cheaper, renewable-powered desalination. Could industrial seawater mining be competitive as a sodium feedstock source?
soco•49m ago
I just realize we have heaps and heaps of seasalt sludge around desalinization units. Dirty sludge, but salty nevertheless, right there at the fingertips. Maybe some of it could be useful?
mekdoonggi•48m ago
That's competing against LFP chemistry, so 33% penalty on a chemistry that itself has a penalty versus NMC.

My understanding about sodium though is that the performance in cold and heat is excellent. So even if you pay a penalty for weight, you can drop the thermal management, which saves quite a bit.

For grid storage, this chemistry will be a game changer. For vehicle, I think it has a ways to go before being preferred over LFP, but that's a guess.

ck2•45m ago
like LiFePo4, sodium-ion also won't burn

ie. so the fire department doesn't have to spend three days trying to put out a Tesla fire

for long hauls, not stop and go city traffic, the weight penalty doesn't matter as much once the weight is moving

a tractor-trailer could have a huge cell behind the cab or replacement the massive diesel tanks?

mekdoonggi•12m ago
I hadn't considered that aspect. Maybe sodium will see applications for hybrid diesel trains, medium haul trucks.
Havoc•1h ago
Really hoping this enables safer battery tech too. Lithium fires are scary
SoftTalker•1h ago
Are sodium fires less scary?
alserio•1h ago
Actually, yes
stronglikedan•56m ago
sodium fires don't make their own oxygen, so I would presume they are less scary
WarmWash•45m ago
In some sodium-ion chemistries they release hydrogen cyanide gas.
ajross•1h ago
And gasoline fires and high speed collisions aren't? This is the bit of paranoia around EV deployment that I genuinely fail to understand. Personal vehicles are by far the most dangerous apparatus with which we interact, already. And we're fine with it! Have you ever, even once, called a Civic or Vespa "scary"?

But put a battery in it suddenly they need new tech before you'll be comfortable?

AndrewDucker•
sourdecor•1h ago
I think it is weird that the recent breakthroughs in sodium batteries have come from China; I would have assumed they would want to keep everyone reliant on their rare earth minerals.
somelamer567•1h ago
Not correct. Sodium-ion batteries were invented in the United States in the 1970s.
sourdecor•37m ago
I didn’t say invented - I said recent breakthroughs.
soleveloper•1h ago
It is time to standardize EV batteries like wheels: 5-10 mainstream types & competition on quality vs. price vs. range.

Regulator help is needed here.

superxpro12•57m ago
Regulations... in THIS economy and administration????
soleveloper•46m ago
Well, the EU regulated USB-C and it affected the whole smartphones world.
nubinetwork•39m ago
Nobody liked micro B anyways... and then there's Apple with their lightning port...
scotty79•38m ago
Largest Chinese companies will define the standards.
ajb•32m ago
Historically, vehicles actually did have completely interchangable motive components. They were called horses.

It would have been difficult given the state of other technology at the time for the inventors of the internal combustion engine to have supplied it as a drop-in horse replacement for your carriage, but you could kind of imagine that working with current technology.

eagerpace•1h ago
There is no reason I can’t put a swimming pool size battery under my house. I don’t care what the energy density is, make it bulletproof and cheap and massive.
shadowpho•1h ago
Cost is a reason. You need to dig out that dirt (which is expensive), it needs supports, your house needs support around it/through it…

Making things bulletproof and massive runs opposite of cheap

stronglikedan•58m ago
I figured they meant while building the house, which of course would cut costs by a lot if it were engineered for.
soco•52m ago
Why under the house? It can sit under your yard, no need to bother with so many tons of construction concrete on top of it.
giwook•48m ago
Not everyone has a yard lol
coldtea•45m ago
but everyone can afford a non-existant huge-ass battery under their house?

(Not everyone has a house either, some rent, others live in apartments, lol)

giwook
poisonborz•57m ago
Oh look it's the quarterly "revolutionary battery tech incoming" article.
soco•48m ago
With a small but significant difference: it's in production already.
WarmWash•41m ago
Something to be aware of, and this is still in flux as the market is so new, but when sodium-ion batteries that use Prussian Blue/Prussian white cathodes enter thermal-runaway (or catch fire for whatever other reason), they release hydrogen cyanide gas.

Obviously manufacturers are aware of this and other chemistries of sodium-ion exist, but when a market is new you can sometimes get all manner of competing tech floating around.

I have entertained the idea of being an early adopter for home battery storage, but learning this made me hold off until their was more info/you could be sure about what you were buying.

criticalfault•23m ago
well, this doesn't sound good.

what cathode material is used as an alternative to not make home battery a chemical weapon in disguise?

1h ago
It's not just vehicles. Battery fires from electric bikes and scooters have also caused issues. And currently you can't put a battery pack into plane hold luggage because of fire risks.
willismichael•1h ago
Electric bikes and scooters are also vehicles, right?
ajross•1h ago
How much more likely are you to be injured on an eBike vs. getting run over on a Schwinn, though? Have you ever been afraid of the bike?

The presence of a different failure mode isn't the question at issue. Yes, they're new tech and require new techniques. Duh, as it were.

It's your abject and frankly irrational paranoia that I'm calling out. Chill the fuck out, as it were. Moving things have always been dangerous, and if you believe this represents a change in aggregate risk you are simply wrong.

coldtea•38m ago
>How much more likely are you to be injured on an eBike vs. getting run over on a Schwinn, though? Have you ever been afraid of the bike?

Many rightly are.

jerf•50m ago
Ask your local fire department about putting fires out in battery-powered cars versus gasoline cars. Yes, there is a qualitative difference and it's not in favor of the battery-powered cars.

That's not to say that it's a stopper for them; it's just part of the cost/benefits analysis. The idea of technologies that are better on all parts of the cost/benefit analysis at once is a science fiction or video game concept. In the real world there's always a mixture of positives and negatives between two different technologies.

red75prime•27m ago
If I'm not mistaken, a lithium battery grid-level energy storage firefighting protocol is "evacuate people and let it burn."
coldtea•42m ago
>And gasoline fires and high speed collisions aren't?

Gasoline car fires are quite rarer in modern cars (don't know about the 1950s), and easier to put off than battery car fires.

And people are already afraid of high speed collisions, plus they are orthogonal of the energy technology used.

>Personal vehicles are by far the most dangerous apparatus with which we interact, already.

And under what framing does it make sense to use the above to argue in favor of adding a dangerous battery tech to them is thus not problematic?

dgacmu•38m ago
You seem to be turning this into a discussion of vehicles, but the post you're replying to was purely about batteries. I get it - ICE cars suck. But speaking for myself, I waited until I could get LFP batteries before adding a lot of lithium to my house. I deemed the fire risk of NMC not worth the benefits. I now have about 15kWh of LFP and I'm happy as a clam.
giantg2•55m ago
Maybe. But anyone who has worked with sodium is likely to be skeptical of that.
•
43m ago
...
fl4regun•38m ago
I could imagine plants messing with it, unless you bury it really deep.
giwook•49m ago
For some reason I wouldn't exactly feel safe knowing there is a huge battery under my house that may combust at any moment.
mschuster91•46m ago
That's the beauty with sodium ion batteries, they are generally considered to be even less flammable than already pretty safe LiFePO4.
margalabargala•40m ago
Unfortunately that's not exactly true.

Aqueous sodium ion chemistries like Na-VPF and Na-tmCN are more fire-safe than lithium, but they're also not as developed/available yet.

Na-NMF, which is what a random off-the-shelf sodium cell is likely to be, is actually more flammable than LiFePO4.

ck2•47m ago
that might be a evolutionary step where you just pump in electrolyte under a housing into waterproof container and every 10 years just pump it out again for fresh electrolyte

doesn't burn like LiFePo4 so no fire risks, though I am not sure what a short-circuit would do in damage/danger

why even under a structure though, just do it like a septic tank?

coldtea•46m ago
"There's no reason" just "make it safe and cheap in huge size".

Kind of like there's no reason we can't go to Mars for tourism. Just make it as convenient, safe, and cheap as a jet to London.

proee•40m ago
I don't think swimming pool is the best size. Why not a hole that's a few meters in diameter but SUPER deep? So long as your water table is sufficiently deep. This way you can service it, should you need to remove/replace contents. If it's under your house - good luck with that.