It seems obvious that time runs in one direction- people don't
grow younger and an egg can't be unscrambled, for example. But
why is this so? In his book "From Eternity to Here," physicist
Sean Carroll seeks to create a better understanding of time.
According to Carroll, time's one-way arrow is due to conditions
before the Big Bang. He argues that our universe is part of a
larger family of universes- and that in sibling universes, time
runs in the opposite direction. He touches on subjects from
entropy and quantum mechanics, to time travel and the meaning of
life. Carroll joins Larry Mantle to explain the mind-boggling
concepts of time. Read the Full Story at KPCC Blogs