Brian Greene on The Hidden Reality
In a new book, mathematician and theoretical physicist Brian Greene explains the concept of multiverses, and why some physicists believe there could be more than one universe. Plus, a look at the hidden universe of Greene's desk, this week's "Desktop Diary" video pick.
Source: http://www.npr.org/2011/03/04/134265287/brian-greene-on-em-the-hidden-reality-em?ft=1&f=1007