Fermilab has used it's Tevatron particle collider to solve another piece of the puzzle.
In smashing together protons and antiprotons, Fermilab has found that the resulting particles from the collision consist of about 1 percent more matter than antimatter. This could explain why we see an abundance of matter in the Universe, and very little antimatter. And it also gives clues as to why we exist at all... if there had been equal amounts of matter and antimatter at the time of the Big Bang, everything would have been annihilated and there would be nothing left. As it happens, though, even with just a 1 percent advantage, matter soon becomes king of the castle.