For regular hydrogen, the researchers calculated that 80 percent of atoms should fall, while 20 percent should slip through gravity’s clutches to escape out of the trap’s top.

This handout illustration released by U.S. National Science Foundation on September 27, 2023, shows an anti-matter gravity experiment ALPHA-g at an undisclosed location.

Nuclear scientists in Switzerland recently dropped some antimatter. The world didn’t blow up, but there were some tiny explosions.