[p1mrx]

"the BASE collaboration has shown, within strict boundaries, that antimatter does in fact respond to gravity in the same way as matter"

https://www.riken.jp/en/news_pubs/research_news/pr/2022/2022...

[lambdasquirrel]

That’s negative charge though, not negative mass. We haven’t been able to experiment with negative mass. No particle physics experiment has produced any evidence it exists.

[phkahler]

No, that doesn't cover the correct situation WRT gravity.