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Tattoos you can turn on and off

https://www.livescience.com/technology/cool-chemistry-trick-allows-new-tattoos-to-turn-on-and-off
17•MortyDev•6h ago

Comments

sleepyguy•52m ago
Your auto-immune system does not like ink.
yahthatsart•6m ago
You don't have an "auto-immune system". Auto-immune means your immune system is attacking your own healthy cells.

Tattoos are fine. There's some evidence that maybe, maybe, immune system responses can be impacted by tattoos. But changes in immune system response does not necessarily mean impaired or negative.

xgulfie•45m ago
So much hype in the article and in the paper for it being "programmable" when it's just... UV reactive? Like, cool but calm down

> In outdoor daylight conditions, including shade, the UV content of incident sunlight is sufficient to activate PhotoTat to a photostationary state

https://www.cell.com/matter-light/fulltext/S3117-5848(26)001...

silicon3383•28m ago
Does it turn the lymphedema off too?

Whatever became of holography? (2011)

https://www.americanscientist.org/article/whatever-became-of-holography
84•cainxinth•3h ago•34 comments

Total Annihilation, rebuilt for modern computers

https://nanolathe.gg
394•jttnr•9h ago•166 comments

Fingerprints are the new cookies

https://royfish.dev/fingerprints-are-the-new-cookies
133•royfish•4h ago•52 comments

Sorry we made you grind LeetCode

https://www.hackerrank.com/writing/why-were-sorry
15•ishanz•24m ago•12 comments

Cartographers of North Korea (2019)

https://cartographers-nk.wonyoung.so/
201•edent•7h ago•38 comments

Recursive self-improvement through collective intelligence

https://pub.sakana.ai/mass/
76•hardmaru•4h ago•39 comments

The gap in shared understanding of LLM capability is widening

https://twitter.com/karpathy/status/2109361546505966046
281•albertzeyer•6h ago•462 comments

Illustration Beyond Proof

https://terrytao.wordpress.com/2026/10/11/illustration-beyond-proof/
38•smilelamp•3h ago•0 comments

Google is illegaly cutting forest to build data centers

https://www.theguardian.com/technology/2026/oct/06/google-datacentres-finland-temporary-halt-envi...
201•heyimada•4h ago•42 comments

Vectorized CLZ and CTZ

https://purplesyringa.moe/blog/vectorized-clz-and-ctz/
17•zX41ZdbW•23h ago•2 comments

Tattoos you can turn on and off

https://www.livescience.com/technology/cool-chemistry-trick-allows-new-tattoos-to-turn-on-and-off
17•MortyDev•6h ago•4 comments

Terence Tao: Math 2.0 [pdf]

https://teorth.github.io/tao-web/slides/math-2-0-caltech-2026.pdf
335•Anon84•13h ago•387 comments

Calculus with Julia

https://jverzani.github.io/CalculusWithJuliaNotes.jl/
8•subset•1d ago•1 comments

Passkeys are a trap

https://nonfunctional.substack.com/p/passkeys-are-a-trap-do-not-use-them
338•laurex•5h ago•191 comments

Local Indexing to reduce tool calling and token usage

https://tedhaley.ca/pensieve/
35•TedHaley•3h ago•3 comments

So, You’d Like To Sell Your Print Issues Of The Onion?

https://theonion.com/archivehunt/
264•mooreds•7h ago•36 comments

Chapter 1 of "Ways of Seeing" by John Berger (1972)

https://www.ways-of-seeing.com/ch1
82•rafael859•8h ago•13 comments

Programmable pigments: Photochromic nanoparticle inks for rewritable tattoos

https://www.cell.com/matter-light/fulltext/S3117-5848(26)00119-5
30•Bluestein•17h ago•2 comments

Doory – Open-Source Canva

https://github.com/shaongitbd/doory
11•acley•2h ago•0 comments

NYC's "Click to Cancel" rule is now in effect

https://www.nyc.gov/main/click-to-cancel
380•gregsadetsky•9h ago•190 comments

I guess I'm using WebP now?

https://anderegg.ca/2026/10/08/i-guess-im-using-webp-now
86•Brajeshwar•2d ago•88 comments

500B tokens later: Letting AI agents decompile a first-person shooter

https://momo5502.com/posts/2026-10-09-game-decompilation/
175•davikr•1d ago•124 comments

The tilde in your PATH may not be your HOME

https://disconnect3d.pl//2026/10/02/dont-put-tilde-in-your-path/
222•arusekk•15h ago•144 comments

Safe SIMD in Rust, even on the inside

https://shnatsel.github.io/safe-simd-in-rust-even-on-the-inside/
47•ravenical•1d ago•2 comments

HashiCorp archives the Boundary open source repo

https://github.com/hashicorp/boundary
48•vmatsiiako•3h ago•9 comments

apsw: Another Python SQLite Wrapper

https://github.com/rogerbinns/apsw
73•tosh•10h ago•15 comments

A Remote Employee Refused 160 Webcam Photos a Day. Her Employer Fired Her

https://www.inc.com/chloe-rosenberg/a-remote-employee-refused-160-webcam-photos-a-day-her-employe...
172•bhrlady•6h ago•129 comments

FlowCE: Calculus on your TI-84 Plus CE

https://tommyb3ll.github.io/FlowCE/
34•jgx0•1d ago•16 comments

How I reverse engineered a commercial spatial audio effect

http://epestr.com/blog/reverse-engineering-a-commercial-spatial-audio-effect/
108•epestr•11h ago•34 comments

Show HN: BetterWispr – Free, open-source dictation for Mac

https://betterwispr.com/
164•kartik017•15h ago•95 comments