Antimatter: Matter's "Evil Twin"
Physicists have done the math and there should be as much antimatter as matter in the universe \u2014 but that hasn't been the case so far. NPR correspondent Geoff Brumfiel explains what's up with matter's "evil twin," antimatter. (Encore episode)
Learn more about sponsor message choices: podcastchoices.com/adchoices
NPR Privacy Policy