Of course, a "particle" spends much of its life as a wave of possibilities. Feynman's sum-over-histories approach considers every possible path throughout spacetime, past present and future. The familiar quantum wave function emerges from this summation and may evolve either forwards or backwards in time. Crucially, the Big Bang and the Big Crunch/Rip are assumed to be mathematically identical perfect absorbers. Break this assumption and the time symmetry is broken. Any asymmetry between the Beginning and End of Time will mean that either the retarded possibilities or the advanced possibilities will predominate. If the balance of matter vs antimatter is a consequence of this symmetry-breaking, then the fact that matter predominates might just tell us something about it.