Science
CERN Experiment Confirms Antimatter Falls Down Not Up in Gravity Test
Lex Fridman Podcast
#497 – Biggest Mysteries in Physics: Antimatter, Dark Energy & ToE – Don Lincoln
What was said
"They did this fantastic measurement and what did they find? They find that antimatter falls down. They measured antimatter fell down with 75% the strength of regular matter, but there were big uncertainties. It's consistent with 1."
In 2023, CERN's ALPHA experiment released antimatter hydrogen from a magnetic bottle and measured its gravitational behavior for the first time. While theoretical consensus predicted antimatter would fall like matter, direct empirical confirmation had never been achieved. The measurement showed antimatter falling downward at 0.75 ± 0.29 times normal gravity—consistent with standard predictions but with large error bars scientists are working to reduce.
Verification status
Attributed speaker claim
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Source and context
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- Programme
- Lex Fridman Podcast
- Episode
- #497 – Biggest Mysteries in Physics: Antimatter, Dark Energy & ToE – Don Lincoln
- Clip time
- 1:41:59
- Original source
- Watch the source segment →
From this episode
Lex Fridman Podcast