This is a recap of the top 10 posts on Hacker News on Sep 20, 2025.

Feel free to leave feedback on Github: https://github.com/denolfe/hacker-news-highlights

• (00:00) - Intro

Trump to impose $100k fee for H-1B worker visas, White House says
https://www.reuters.com/business/media-telecom/trump-mulls-adding-new-100000-fee-h-1b-visas-bloomberg-news-reports-2025-09-19/
https://news.ycombinator.com/item?id=45305845

Ants that seem to defy biology – They lay eggs that hatch into another species
https://www.smithsonianmag.com/smart-news/these-ant-queens-seem-to-defy-biology-they-lay-eggs-that-hatch-into-another-species-180987292/
https://news.ycombinator.com/item?id=45300865

Less is safer: How Obsidian reduces the risk of supply chain attacks
https://obsidian.md/blog/less-is-safer/
https://news.ycombinator.com/item?id=45307242

The best YouTube downloaders, and how Google silenced the press
https://windowsread.me/p/best-youtube-downloaders
https://news.ycombinator.com/item?id=45300810

Internet Archive's big battle with music publishers ends in settlement
https://arstechnica.com/tech-policy/2025/09/internet-archives-big-battle-with-music-publishers-ends-in-settlement/
https://news.ycombinator.com/item?id=45255785

Show the Physics
https://interactivetextbooks.tudelft.nl/showthephysics/Introduction/About.html
https://news.ycombinator.com/item?id=45265760

Show HN: WeUseElixir - Elixir project directory
https://weuseelixir.com/
https://news.ycombinator.com/item?id=45306120

Kernel: Introduce Multikernel Architecture Support
https://lwn.net/ml/all/[email protected]/
https://news.ycombinator.com/item?id=45302721

If all the world were a monorepo
https://jtibs.substack.com/p/if-all-the-world-were-a-monorepo
https://news.ycombinator.com/item?id=45259623

Feedmaker: URL + CSS selectors = RSS feed
https://feedmaker.fly.dev
https://news.ycombinator.com/item?id=45306701