This asymmetry explains why everything exists — which, from a mathematical point of view, it should not. Equal amounts of matter and antimatter should have been created in the Big Bang, and the two types would have annihilated each other, leaving nothing behind. But somehow matter won out, meaning there was an imbalance between matter and antimatter at some point. Supersymmetry is one way to explain this. Supersymmetric particles, which have names like squarks and selectrons, exist for every particle and have slightly different characteristics than their counterparts.