Jesse Emspak Live Science Contributor,LiveScience
When the universe first formed some 13.7 billion years ago, current theories say that equal amounts of matter and its bizarre cousin, antimatter, should have been produced during the Big Bang. Physicists know that when the two come into contact, they annihilate each other — poof. If that were the case, though, nothing should exist except photons and neutrinos. And yet, here we are. Calculations show there was a tiny bit more matter than antimatter — enough so that things exist — but why?