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
"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.
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Lex Fridman Podcast