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We built another object storage

https://fractalbits.com/blog/why-we-built-another-object-storage/
60•fractalbits•2h ago•9 comments

Java FFM zero-copy transport using io_uring

https://www.mvp.express/
25•mands•5d ago•6 comments

How exchanges turn order books into distributed logs

https://quant.engineering/exchange-order-book-distributed-logs.html
49•rundef•5d ago•17 comments

macOS 26.2 enables fast AI clusters with RDMA over Thunderbolt

https://developer.apple.com/documentation/macos-release-notes/macos-26_2-release-notes#RDMA-over-...
467•guiand•18h ago•237 comments

AI is bringing old nuclear plants out of retirement

https://www.wbur.org/hereandnow/2025/12/09/nuclear-power-ai
33•geox•1h ago•25 comments

Sick of smart TVs? Here are your best options

https://arstechnica.com/gadgets/2025/12/the-ars-technica-guide-to-dumb-tvs/
433•fleahunter•1d ago•362 comments

Photographer built a medium-format rangefinder, and so can you

https://petapixel.com/2025/12/06/this-photographer-built-an-awesome-medium-format-rangefinder-and...
78•shinryuu•6d ago•9 comments

Apple has locked my Apple ID, and I have no recourse. A plea for help

https://hey.paris/posts/appleid/
865•parisidau•10h ago•445 comments

GNU Unifont

https://unifoundry.com/unifont/index.html
287•remywang•18h ago•68 comments

A 'toaster with a lens': The story behind the first handheld digital camera

https://www.bbc.com/future/article/20251205-how-the-handheld-digital-camera-was-born
42•selvan•5d ago•18 comments

Beautiful Abelian Sandpiles

https://eavan.blog/posts/beautiful-sandpiles.html
83•eavan0•3d ago•16 comments

Rats Play DOOM

https://ratsplaydoom.com/
332•ano-ther•18h ago•123 comments

Show HN: Tiny VM sandbox in C with apps in Rust, C and Zig

https://github.com/ringtailsoftware/uvm32
167•trj•17h ago•11 comments

OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI

https://simonwillison.net/2025/Dec/12/openai-skills/
481•simonw•15h ago•271 comments

Computer Animator and Amiga fanatic Dick Van Dyke turns 100

109•ggm•6h ago•23 comments

Will West Coast Jazz Get Some Respect?

https://www.honest-broker.com/p/will-west-coast-jazz-finally-get
10•paulpauper•6d ago•2 comments

Formula One Handovers and Handovers From Surgery to Intensive Care (2008) [pdf]

https://gwern.net/doc/technology/2008-sower.pdf
82•bookofjoe•6d ago•33 comments

Show HN: I made a spreadsheet where formulas also update backwards

https://victorpoughon.github.io/bidicalc/
179•fouronnes3•1d ago•85 comments

Freeing a Xiaomi humidifier from the cloud

https://0l.de/blog/2025/11/xiaomi-humidifier/
126•stv0g•1d ago•51 comments

Obscuring P2P Nodes with Dandelion

https://www.johndcook.com/blog/2025/12/08/dandelion/
57•ColinWright•4d ago•1 comments

Go is portable, until it isn't

https://simpleobservability.com/blog/go-portable-until-isnt
119•khazit•6d ago•101 comments

Ensuring a National Policy Framework for Artificial Intelligence

https://www.whitehouse.gov/presidential-actions/2025/12/eliminating-state-law-obstruction-of-nati...
169•andsoitis•1d ago•217 comments

Poor Johnny still won't encrypt

https://bfswa.substack.com/p/poor-johnny-still-wont-encrypt
52•zdw•10h ago•64 comments

YouTube's CEO limits his kids' social media use – other tech bosses do the same

https://www.cnbc.com/2025/12/13/youtubes-ceo-is-latest-tech-boss-limiting-his-kids-social-media-u...
84•pseudolus•3h ago•67 comments

Slax: Live Pocket Linux

https://www.slax.org/
41•Ulf950•5d ago•5 comments

50 years of proof assistants

https://lawrencecpaulson.github.io//2025/12/05/History_of_Proof_Assistants.html
107•baruchel•15h ago•17 comments

Gild Just One Lily

https://www.smashingmagazine.com/2025/04/gild-just-one-lily/
29•serialx•5d ago•5 comments

Capsudo: Rethinking sudo with object capabilities

https://ariadne.space/2025/12/12/rethinking-sudo-with-object-capabilities.html
75•fanf2•17h ago•44 comments

Google removes Sci-Hub domains from U.S. search results due to dated court order

https://torrentfreak.com/google-removes-sci-hub-domains-from-u-s-search-results-due-to-dated-cour...
193•t-3•11h ago•34 comments

String theory inspires a brilliant, baffling new math proof

https://www.quantamagazine.org/string-theory-inspires-a-brilliant-baffling-new-math-proof-20251212/
167•ArmageddonIt•22h ago•154 comments
Open in hackernews

Space Selfie

https://space.crunchlabs.com/
160•rossdavidh•6mo ago

Comments

rossdavidh•6mo ago
Website has a link to a YT video that explains it, but basically free service to upload your pic, get a selfie taken on satellite in space, sent back to you. Free.
iambateman•6mo ago
This is pretty cool. We uploaded ours a few days ago and still waiting.

My five year old son is pumped

layer8•6mo ago
From the FAQ it sounds like it may take a few months:

“The first batch of selfies should be returning mid-summer and we will email you ahead of time. If you want to jump closer to the front of the queue and not wait a few months, please make sure you are an active CrunchLabs subscriber (Build Box, Hack Pack). Or, if you're an educator, send an email to help@crunchlabs.com and let us know that your selfie is a class photo and we'll take your selfie first!”

ElijahLynn•6mo ago
Yup, got that same message!

Still an amazing thing though!

My son and I watched the launch video where they sent it up to space. Highly recommend watching that with whoever you're going to take the selfie with!

aerophilic•6mo ago
My kids have loved watching Mark Robers videos, have the subscriptions (one of both the backpack and crunchpack), and we uploaded our video for SatGus.

If you have young kids (6-15) these are perfect educational tools. Highly recommend. Only downside is some of them are a bit “mischievous”. For example a “Bobbie trap” that launches balls at whomever tripped the wire. Good times…

schmichael•6mo ago
Same! Mark Rober is what changed my mind about YouTube for kids. He's a wildly popular creator that's even shilling a product and yet... I'm ok with all of it? He seems to very legitimately care about sharing getting kids excited about STEM, and if he gets rich doing it: great! The product is less offensive than the sugary cereal I watched commercials for while watching Saturday morning cartoons as a kid. Definitely one of the few YouTube channels I let my kids watch unattended.
hlfshell•6mo ago
There's shilling a product because someone handed you a bag, and then there's building a product you believe in. You feel okay with it because it's clearly the latter versus another NordVPN commercial. Even if the product ends up failing (and I am under no predilection to believe this will) he has presented nothing but honest enthusiasm towards his goal that you can't help but root for it.
Aurornis•6mo ago
We just started watching Mark Rober videos. I started with some random old videos and they were great. Nice educational content in the middle of an entertaining video.

Then the algorithm handed us some more recent videos and they felt like a pivot to Nickelodeon style content: We watched Mark Rober run through a green slime obstacle course with a lot of loud noises and action, but basically zero educational value.

So as someone new to this: Any tips? Should I be sticking to old videos only if I want some educational value? My kids only watch with me as an activity we do together, so I’m always looking for good videos that can keep us away from the content farm stuff.

hlfshell•6mo ago
He's gone all in on the Crunch Labs brand, which is kind of built around the younger audience. This isn't a bad thing, but it does mean that older edutainment enjoyers kind of age out of his stuff. Not to say there's no value in them, but there will be more of an entertainment focus than prior edutainment focused videos.

I recommend checking out Stuff Made Here; great build videos of engineering principles in an entertaining fashion to show building cool complicated stuff.

Xyla Foxlin, a wonderful maker, also posts educational videos between her projects, like an in-depth look at how plane wings work.

npinsker•6mo ago
Great recommendations. Steve Mould is another in that vein, and Kurzgesagt (though quite different stylistically) is one of my favorites and could be something you’re looking for.
Robotbeat•6mo ago
Steve Mould has a great vibe. Combination of a sort of subdued humility and intelligence.
ryanisnan•6mo ago
> Stuff Made Here

Whenever I am feeling smart or particularly talented, I like watching Shane's videos. I'm swiftly reminded that I have no idea what the hell I'm doing and carry on.

ThePinion•6mo ago
That's me reading Hacker News every day.
skipnup•6mo ago
He doesn't either, does he? But he's great in outlining how to get to the point of having enough idea to go through with his project.
al_borland•6mo ago
I like that he still shows the struggle, so it’s not like he’s pretending to know it all. I find this helps give me perspective when I’m in a similar situation, where everything seems to be going wrong.
aaronblohowiak•6mo ago
Veritasium is cool, too!

I like practical engineering, but my kids aren't ready for how awesome Grady is... yet.

zikduruqe•6mo ago
Put Technology Connections in your pocket for when they are ready.
borski•6mo ago
I’m 37, and his Hack Pack stuff has been pretty fun. Sure, it’s easy, but fun.
al_borland•6mo ago
Do the skills build on each other where they need to be done in order?

I got a subscription, but wasn’t super interested in the first one, so it’s still sitting in the box. Then the other boxes started showing up. I now have a full year’s worth and haven’t done a single one, because I feel like I should start with the one I’m least interested in.

aerophilic•6mo ago
They don’t… just do whichever one you are most interested in doing. Each box more or less stands alone (at least that is what I am observing from my kids assembly of them)
borski•6mo ago
They use some similar ideas (a servo is still a servo in a different context), but they are totally independent of one another. Do the one you find most fun!

They’re all good though, tbh.

matthewmueller•6mo ago
The first squirrel video might be the best youtube video ever. Surprising, entertaining, informative, accessible. I'd start there!
madhacker•6mo ago
Reminds a bit of Mr Beast
bradfa•6mo ago
The best ones seem to be the year or two just before the launch of Crunch Labs. Decent educational content, lots of excitement for engineering and science, and no real shilling. Lots of the newer stuff feels like it was created or edited by the Mr Beast team.

Some of Mark’s cameos on other channels since Crunch Labs started have been good, though.

Sander_Marechal•6mo ago
Take a look at the "Maker Secret Santa" series of video's. It's a yearly collaborative series between a bunch of different maker channels. It can give you a great idea as to what makers you'd like to follow.
shemtay•6mo ago
i had the same experience. my solution was to configure youtube kids to only show my whitelist of mannually approved videos.
jayknight•6mo ago
Is there a limit to what you can upload? I figure they're not just going to let people upload a million pictures, but can I do one per kid?
roydivision•6mo ago
It seems from my own upload that you are limited to one / email address. So yes you could just use a bunch of aliases, but I guess they're banking on most people only having access to a few addresses.
encoderer•6mo ago
My 7 year old got into rober videos about a year ago. Really hope she always prefers this kind of stuff to junk food like Mr Beast.
ElijahLynn•6mo ago
SatGus launch party (great watch) https://space.crunchlabs.com/livestream https://www.youtube.com/live/6Zqe3SJVjUM?si=CB7_3YCQTx6GqZ1x (direct)

*SatGus is named after Phat Gus from Mark Robert's squirrel obstacle course.

icameron•6mo ago
Shoot it’s getting a 504 Gateway timeout. Must be trending!
Brajeshwar•6mo ago
A few years back, my co-founder and I thought we should try something outside of work, something interesting but that may not be useful but fun. But we disbanded after a few discussion round without building it.

A mobile app that will help you time and position yourself along the path of your "order" where a satellite flyby and take a selfie of earth with you in it. We realize that even at an expense it might not be able to make a person out of the bigger picture and the cost would be too high. Even after enhancement (our ML Model), it won't still make significant difference of value or fun.

glassofbees•6mo ago
I'm really curious about the technical constraints they're working with - how much bandwidth do they have in each direction, how many images does that allow for, what resolution/format/quality are they using, how many images are in the queue, etc
quelup•6mo ago
I sent a selfie when the YT video came out. Even though it's basically a picture of a picture, I can't help but be excited that it's being taken from actual space. Great for getting the kids excited about what engineering can do.