Comment "why matter dominates over antimatter" (Score 1) 103
I'm betting there's another reality where antimatter dominates over matter and the whole situation is reversed. Everything stays that way on either side until one or the other of them produces a civilization able to punch a hole through whatever it is that separates them. When that happens the two sides equalize but when they hit perfect balance the whole thing explodes in the next big bang where the amounts of matter and antimatter on each of the sides gets knocked out of balance again.