The unmovable mover, the first cause, the Big Bang. For centuries, we have grappled with the moment of creation: How did something come from nothing? Physicist Lawrence Krauss says it just does. In fact, he says 70% of the energy in our universe is contained in the empty space between quarks, atoms, and galaxies. He sits down with Steve Paikin to discuss the notion of a creator-less universe, and how science can be spiritual.