top 50% hacker news stories for 2025-09-20

Ultrasonic Chef's Knife

https://seattleultrasonics.com/

1 year ago

824 upvotes – 671 comments

$2 WeAct Display FS adds a 0.96-inch USB information display to your computer

https://www.cnx-software.com/2025/09/18/2-weact-display-fs-adds-a-0-96-inch-usb-information-display-to-your-computer/

1 year ago

409 upvotes – 169 comments

Microsoft has urged its employees on H-1B and H-4 visas to return immediately

https://timesofindia.indiatimes.com/technology/tech-news/microsoft-has-a-24-hour-deadline-warning-for-indian-and-other-foreign-employees-after-h1-b-visa-fees-hike-to-100000-strongly-recommend-h1b-visa-holders-/articleshow/124010245.cms

1 year ago

406 upvotes – 615 comments

Disney+ cancellation page crashes as customers rush to quit

https://creators.yahoo.com/lifestyle/story/disney-cancellation-page-crashes-as-customers-rush-to-quit-after-kimmel-suspension-033512277.html

1 year ago

401 upvotes – 297 comments

FLX1s phone is launched

https://furilabs.com/flx1s-is-launched/

1 year ago

337 upvotes – 262 comments

Git: Introduce Rust and announce it will become mandatory in the build system

https://lore.kernel.org/git/[email protected]/

1 year ago

335 upvotes – 413 comments

Designing NotebookLM

https://jasonspielman.com/notebooklm

1 year ago

295 upvotes – 84 comments

Are touchscreens in cars dangerous?

https://www.economist.com/science-and-technology/2025/09/19/are-touchscreens-in-cars-dangerous

1 year ago

238 upvotes – 242 comments

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

https://gwern.net/doc/science/2019-savage.pdf

1 year ago

229 upvotes – 84 comments

Britain jumps into bed with Palantir in £1.5B defense pact

https://www.theregister.com/2025/09/20/uk_palantir_defense_pact/

1 year ago

207 upvotes – 134 comments

Images over DNS

https://dgl.cx/2025/09/images-over-dns

1 year ago

201 upvotes – 50 comments

Trumpcard (Official US Government Website)

https://trumpcard.gov/

1 year ago

193 upvotes – 152 comments

If you are good at code review, you will be good at using AI agents

https://www.seangoedecke.com/ai-agents-and-code-review/

1 year ago

192 upvotes – 197 comments

PYREX vs. pyrex: What's the difference?

https://www.corning.com/worldwide/en/products/life-sciences/resources/stories/in-the-field/pyrex-vs-pyrex-whats-the-difference.html

1 year ago

173 upvotes – 122 comments

IG Nobel Prize Winners 2025

https://improbable.com/ig/winners/

1 year ago

163 upvotes – 47 comments

H1Bs will start costing $100k/yr

https://www.boundless.com/blog/trump-administration-to-propose-new-100000-fee-for-h-1b-visa-applications/

1 year ago

149 upvotes – 4 comments

macOS becomes iOS: Safari video controls

https://underpassapp.com/news/2025/9/8.html

1 year ago

147 upvotes – 150 comments

The LLM Lobotomy?

https://learn.microsoft.com/en-us/answers/questions/5561465/the-llm-lobotomy

1 year ago

140 upvotes – 61 comments

Is Zig's new writer unsafe?

https://www.openmymind.net/Is-Zigs-New-Io-Unsafe/

1 year ago

138 upvotes – 182 comments

Vapor chamber tech keeps iPhone 17 Pro cool

https://spectrum.ieee.org/iphone-17-pro-vapor-chamber

1 year ago

133 upvotes – 297 comments

A vibrator helped me debug a motorcycle brake light system

https://bikesafe.me/blogs/news/how-a-vibrator-helped-me-debug-a-motorcycle-brake-light-system

1 year ago

128 upvotes – 56 comments

Microsoft memo advises H1B employees to return immediately if currently abroad

https://x.com/onestpress/status/1969374699038675364

1 year ago

127 upvotes – 171 comments

Things managers do that leaders never would

https://simonsinek.com/stories/5-things-managers-do-that-leaders-never-would-according-to-simon/

1 year ago

118 upvotes – 118 comments

Systemd can be a cause of restrictions on daemons

https://utcc.utoronto.ca/~cks/space/blog/linux/SystemdCanBeRestrictionCause

1 year ago

116 upvotes – 169 comments

A Beautiful Maths Game

https://sinerider.com/

1 year ago

115 upvotes – 31 comments

China's 200M gig workers are a warning for the world

https://www.economist.com/leaders/2025/09/18/chinas-200m-gig-workers-are-a-warning-for-the-world

1 year ago

111 upvotes – 254 comments

Node 20 will be deprecated on GitHub Actions runners

https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

1 year ago

109 upvotes – 63 comments

Did you read the quarter-million-line license for your Slack app?

https://mastodon.mit.edu/@Eggfreckles/114825126857396420

1 year ago

104 upvotes – 57 comments

Why do some gamers invert their controls?

https://www.theguardian.com/games/2025/sep/18/why-do-some-gamers-invert-their-controls-scientists-now-have-answers-but-theyre-not-what-you-think

1 year ago

104 upvotes – 170 comments

Morgan and Morgan takes Disney to court over 'Steamboat Willie' in ads

https://www.clickorlando.com/news/local/2025/09/17/morgan-morgan-takes-disney-to-court-over-rights-to-feature-steamboat-willie-in-law-firm-ads/

1 year ago

101 upvotes – 80 comments

Philips announces digital pathology scanner with native DICOM JPEG XL output

https://www.philips.com/a-w/about/news/archive/standard/news/articles/2025/philips-announces-digital-pathology-scanner-with-native-configurable-dicom-jpeg-and-jpeg-xl-output-in-world-first.html

1 year ago

100 upvotes – 53 comments

A revolution in English bell ringing

https://harpers.org/archive/2025/10/a-change-of-tune-veronique-greenwood-bell-ringing/

1 year ago

99 upvotes – 35 comments

Kitty – GPU based terminal emulator

https://sw.kovidgoyal.net/kitty/

1 year ago

98 upvotes – 84 comments

Invasive Israeli-founded bloatware is harvesting data from Samsung users in WANA

https://smex.org/invasive-israeli-software-is-harvesting-data-from-samsung-users-in-wana/

1 year ago

97 upvotes – 30 comments

Writing a competitive BZip2 encoder in Ada from scratch in a few days – part 3

https://gautiersblog.blogspot.com/2025/09/writing-competitive-bzip2-encoder-in.html

1 year ago

97 upvotes – 9 comments

Grok 4 Fast

https://x.ai/news/grok-4-fast

1 year ago

96 upvotes – 76 comments

A brief history of threads and threading

https://eclecticlight.co/2025/09/20/a-brief-history-of-threads-and-threading/

1 year ago

95 upvotes – 28 comments

Deep researcher with test-time diffusion

https://research.google/blog/deep-researcher-with-test-time-diffusion/

1 year ago

93 upvotes – 13 comments

Parents outraged as Meta uses photos of schoolgirls in ads targeting man

https://www.theguardian.com/technology/2025/sep/20/parents-outraged-meta-uses-photos-schoolgirls-ads-man

1 year ago

92 upvotes – 20 comments

For comedians around the world, the laughs often end as democracy fades

https://www.theguardian.com/world/2025/sep/19/for-comedians-around-the-world-the-laughs-often-end-as-democracy-fades

1 year ago

90 upvotes – 72 comments

Living microbial cement supercapacitors with reactivatable energy storage

https://www.cell.com/cell-reports-physical-science/fulltext/S2666-3864(25)00409-6

1 year ago

88 upvotes – 44 comments

The dawn of the post-literate society – and the end of civilisation

https://jmarriott.substack.com/p/the-dawn-of-the-post-literate-society-aa1

1 year ago

87 upvotes – 131 comments

TV Time Machine: A Raspberry Pi That Plays Random 90s TV

https://quarters.captaintouch.com/blog/posts/2025-09-20-tv-time-machine-a-raspberry-pi-that-plays-random-90s-tv.html

1 year ago

84 upvotes – 44 comments

The allure of new languages vs. the necessity of problem-solving

https://dayvster.com/blog/are-we-chasing-language-hype-over-solving-real-problems/

1 year ago

83 upvotes – 92 comments

High-performance read-through cache for object storage

https://github.com/s2-streamstore/cachey

1 year ago

82 upvotes – 18 comments

Show HN: FocusStream – Focused, distraction-free YouTube for learners

https://focusstream.media

1 year ago

81 upvotes – 46 comments

LLM-Deflate: Extracting LLMs into Datasets

https://www.scalarlm.com/blog/llm-deflate-extracting-llms-into-datasets/

1 year ago

77 upvotes – 39 comments

Introduction to Programming Languages

https://hjaem.info/itpl

1 year ago

76 upvotes – 10 comments

What Makes System Calls Expensive: A Linux Internals Deep Dive

https://blog.codingconfessions.com/p/what-makes-system-calls-expensive

1 year ago

72 upvotes – 10 comments

Tariffs make it harder to justify US investments, automakers and suppliers warn

https://www.autonews.com/manufacturing/an-trump-tariffs-suppliers-automaker-letter-mbs-0919/

1 year ago

72 upvotes – 19 comments

New H-1B visa fee will not apply to existing holders, official says

https://www.axios.com/2025/09/20/trump-h-1b-immigration-visas

1 year ago

71 upvotes – 88 comments

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

https://www.uscis.gov/sites/default/files/document/memos/H1B_Proc_Memo_FINAL.pdf

1 year ago

70 upvotes – 79 comments

Supporting Our AI Overlords: Redesigning Data Systems to Be Agent-First

https://arxiv.org/abs/2509.00997

1 year ago

67 upvotes – 20 comments

Teen suspect surrenders in 2023 Las Vegas casino cyberattack case

https://www.casino.org/news/teen-suspect-surrenders-in-2023-las-vegas-strip-cyberattack-case/

1 year ago

64 upvotes – 65 comments

Compiling a Functional Language to LLVM (2023)

https://danieljharvey.github.io/posts/2023-02-08-llvm-compiler-part-1.html

1 year ago

63 upvotes – 0 comments

Are top CEOs underpaid? (2019)

https://marginalrevolution.com/marginalrevolution/2019/04/are-top-ceos-underpaid.html

1 year ago

61 upvotes – 44 comments

Czech founding father Masaryk's message revealed in long-sealed envelope

https://www.nbcnews.com/world/europe/masaryk-message-revealed-envelope-czech-founding-father-rcna232353

1 year ago

59 upvotes – 2 comments

Overcoming barriers of hydrogen storage with a low-temperature hydrogen battery

https://www.isct.ac.jp/en/news/okmktjxyrvdc

1 year ago

58 upvotes – 54 comments

Bezier Curve as Easing Function in C++

https://asawicki.info/news_1790_bezier_curve_as_easing_function_in_c

1 year ago

58 upvotes – 6 comments

The Counterclockwise Experiment

https://domofutu.substack.com/p/the-counterclockwise-experiment

1 year ago

58 upvotes – 25 comments

The Gold Card

https://www.whitehouse.gov/presidential-actions/2025/09/the-gold-card/

1 year ago

57 upvotes – 71 comments
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