The basic laws of physics work equally well forward or backward in time, yet we perceive time to move in one direction only—toward the future. Why?
To account for it, we have to delve into the prehistory of the universe, to a time before the big bang. Our universe may be part of a much larger multiverse, which as a whole is time-symmetric. Time may run backward in other universes.
Read the rest here but be warned: Your head just might blow up.
The Intelligencer notes the same
So does nathanrca
And Not Even Wrong