Hacker News on Saturday, 20 September 2025

Ultrasonic Chef's Knife(seattleultrasonics.com)

730 points by hemloc_io 1 year ago | 598 comments

Product landing page from Seattle Ultrasonics for the C-200, billed as the first ultrasonic chef's knife for home cooks, open for pre-order.

$2 WeAct Display FS adds a 0.96-inch USB information display to your computer(cnx-software.com)

388 points by smartmic 1 year ago | 162 comments

CNX Software article about the $2 WeAct Display FS, a 0.96-inch USB information display that shows system stats or other info from a computer.

AI was supposed to help juniors shine. Why does it mostly make seniors stronger?(elma.dev)

370 points by elmsec 1 year ago | 395 comments

A personal blog post arguing that AI coding tools benefit senior developers more than juniors, outlining where AI helps and falls short in coding.

Visa holders on vacation have 15 hours to return to US or pay $100k fee(timesofindia.indiatimes.com)

320 points by irthomasthomas 1 year ago | 488 comments

Times of India article reporting Microsoft urged H-1B and H-4 visa employees to return to the US before a September 21 deadline due to a new $100,000 H-1B fee.

FLX1s phone is launched(furilabs.com)

310 points by slau 1 year ago | 219 comments

Git: Introduce Rust and announce it will become mandatory in the build system(lore.kernel.org)

281 points by WhyNotHugo 1 year ago | 243 comments

Designing NotebookLM(jasonspielman.com)

271 points by vinhnx 1 year ago | 85 comments

Cormac McCarthy's tips on how to write a science paper (2019) [pdf](gwern.net)

202 points by surprisetalk 1 year ago | 80 comments

Are touchscreens in cars dangerous?(economist.com)

189 points by Brajeshwar 1 year ago | 179 comments

Images over DNS(dgl.cx)

186 points by dgl 1 year ago | 49 comments

Britain jumps into bed with Palantir in £1.5B defense pact(theregister.com)

163 points by rntn 1 year ago | 102 comments

PYREX vs. pyrex: What's the difference?(corning.com)

151 points by lisper 1 year ago | 115 comments

If you are good at code review, you will be good at using AI agents(seangoedecke.com)

130 points by imasl42 1 year ago | 133 comments

IG Nobel Prize Winners 2025(improbable.com)

126 points by JeremyTheo 1 year ago | 35 comments

Is Zig's new writer unsafe?(openmymind.net)

123 points by ibobev 1 year ago | 112 comments

Vapor chamber tech keeps iPhone 17 Pro cool(spectrum.ieee.org)

118 points by rbanffy 1 year ago | 253 comments

macOS becomes iOS: Safari video controls(underpassapp.com)

115 points by latexr 1 year ago | 110 comments

A vibrator helped me debug a motorcycle brake light system(bikesafe.me)

113 points by mygnu 1 year ago | 44 comments

Systemd can be a cause of restrictions on daemons(utcc.utoronto.ca)

101 points by zdw 1 year ago | 103 comments

Node 20 will be deprecated on GitHub Actions runners(github.blog)

101 points by redbell 1 year ago | 47 comments

In defence of swap: common misconceptions (2018)(chrisdown.name)

95 points by jitl 1 year ago | 92 comments

Things managers do that leaders never would(simonsinek.com)

94 points by 9x39 1 year ago | 60 comments

Writing a competitive BZip2 encoder in Ada from scratch in a few days – part 3(gautiersblog.blogspot.com)

92 points by etrez 1 year ago | 8 comments

The LLM Lobotomy?(learn.microsoft.com)

89 points by sgt3v 1 year ago | 38 comments

Living microbial cement supercapacitors with reactivatable energy storage(cell.com)

84 points by PaulHoule 1 year ago | 39 comments

A revolution in English bell ringing(harpers.org)

83 points by ascertain 1 year ago | 32 comments

Philips announces digital pathology scanner with native DICOM JPEG XL output(philips.com)

79 points by ksec 1 year ago | 40 comments

A Beautiful Maths Game(sinerider.com)

78 points by waonderer 1 year ago | 23 comments

A brief history of threads and threading(eclecticlight.co)

78 points by emschwartz 1 year ago | 20 comments

Why do some gamers invert their controls?(theguardian.com)

77 points by zdw 1 year ago | 120 comments

Deep researcher with test-time diffusion(research.google)

75 points by simonpure 1 year ago | 11 comments

Kitty – GPU based terminal emulator(sw.kovidgoyal.net)

73 points by andsoitis 1 year ago | 49 comments

The allure of new languages vs. the necessity of problem-solving(dayvster.com)

73 points by ibobev 1 year ago | 68 comments

Grok 4 Fast(x.ai)

70 points by meetpateltech 1 year ago | 35 comments

Show HN: FocusStream – Focused, distraction-free YouTube for learners(focusstream.media)

70 points by pariharAshwin 1 year ago | 39 comments

High-performance read-through cache for object storage(github.com)

69 points by pranay01 1 year ago | 15 comments

Morgan and Morgan takes Disney to court over 'Steamboat Willie' in ads(clickorlando.com)

65 points by wrayjustin 1 year ago | 39 comments

TV Time Machine: A Raspberry Pi That Plays Random 90s TV(quarters.captaintouch.com)

60 points by capitain 1 year ago | 33 comments

Teen suspect surrenders in 2023 Las Vegas casino cyberattack case(casino.org)

55 points by campuscodi 1 year ago | 39 comments

Microsoft memo advises H1B employees to return immediately if currently abroad(xcancel.com)

54 points by pfexec 1 year ago | 37 comments

Introduction to Programming Languages(hjaem.info)

54 points by parksb 1 year ago | 10 comments

Compiling a Functional Language to LLVM (2023)(danieljharvey.github.io)

54 points by PaulHoule 1 year ago | 0 comments

LLM-Deflate: Extracting LLMs into Datasets(scalarlm.com)

53 points by gdiamos 1 year ago | 26 comments

The dawn of the post-literate society – and the end of civilisation(jmarriott.substack.com)

53 points by drankl 1 year ago | 40 comments

The Counterclockwise Experiment(domofutu.substack.com)

53 points by domofutu 1 year ago | 19 comments

China's 200M gig workers are a warning for the world(economist.com)

51 points by miohtama 1 year ago | 101 comments

Supporting Our AI Overlords: Redesigning Data Systems to Be Agent-First(arxiv.org)

49 points by derekhecksher 1 year ago | 17 comments

Bezier Curve as Easing Function in C++(asawicki.info)

49 points by ibobev 1 year ago | 6 comments

Overcoming barriers of hydrogen storage with a low-temperature hydrogen battery(isct.ac.jp)

48 points by rustoo 1 year ago | 52 comments

What Makes System Calls Expensive: A Linux Internals Deep Dive(blog.codingconfessions.com)

45 points by rbanffy 1 year ago | 4 comments

AI and surveillance capitalism are undermining democracy(thebulletin.org)

40 points by pseudolus 1 year ago | 9 comments

Czech founding father Masaryk's message revealed in long-sealed envelope(nbcnews.com)

39 points by tim-kt 1 year ago | 2 comments

New H-1B visa fee will not apply to existing holders, official says(axios.com)

39 points by srameshc 1 year ago | 31 comments

US Gov acknowledges that 100K fee does not apply to existing H-1B visas holders [pdf](uscis.gov)

37 points by zzzeek 1 year ago | 33 comments

Invasive Israeli-founded bloatware is harvesting data from Samsung users in WANA(smex.org)

34 points by like_any_other 1 year ago | 0 comments

Bringing restartable sequences out of the niche(lwn.net)

29 points by PaulHoule 1 year ago | 2 comments

Triple Buffering in Rendering APIs(4rknova.com)

27 points by ibobev 1 year ago | 1 comments

The Gold Card(whitehouse.gov)

26 points by ushakov 1 year ago | 31 comments

Homegrown digital road maps turn into lifelines for West Bank’s Palestinians(restofworld.org)

25 points by vinnyglennon 1 year ago | 1 comments

For comedians around the world, the laughs often end as democracy fades(theguardian.com)

24 points by thunderbong 1 year ago | 18 comments