This is a recap of the top 10 posts on Hacker News on May 21, 2025.

Veo 3 and Imagen 4, and a new tool for filmmaking called Flow
https://blog.google/technology/ai/generative-media-models-io-2025/
https://news.ycombinator.com/item?id=44044043

Deep Learning Is Applied Topology
https://theahura.substack.com/p/deep-learning-is-applied-topology
https://news.ycombinator.com/item?id=44041738

My new hobby: watching AI slowly drive Microsoft employees insane
https://old.reddit.com/r/ExperiencedDevs/comments/1krttqo/my_new_hobby_watching_ai_slowly_drive_microsoft/
https://news.ycombinator.com/item?id=44050152

Gemma 3n preview: Mobile-first AI
https://developers.googleblog.com/en/introducing-gemma-3n/
https://news.ycombinator.com/item?id=44044199

Litestream: Revamped
https://fly.io/blog/litestream-revamped/
https://news.ycombinator.com/item?id=44045292

Show HN: 90s.dev – Game maker that runs on the web
https://90s.dev/blog/finally-releasing-90s-dev.html
https://news.ycombinator.com/item?id=44042371

The NSA Selector
https://github.com/wenzellabs/the_NSA_selector
https://news.ycombinator.com/item?id=44044459

Why does the U.S. always run a trade deficit?
https://libertystreeteconomics.newyorkfed.org/2025/05/why-does-the-u-s-always-run-a-trade-deficit/
https://news.ycombinator.com/item?id=44040407

Show HN: A Tiling Window Manager for Windows, Written in Janet
https://agent-kilo.github.io/jwno/
https://news.ycombinator.com/item?id=44042490

AI's energy footprint
https://www.technologyreview.com/2025/05/20/1116327/ai-energy-usage-climate-footprint-big-tech/
https://news.ycombinator.com/item?id=44039808