The Big Bang, take two: physicists gear up to flip the switch on the Large Hadron Collider

Tomorrow, in an effort to recreate the conditions that followed the big bang, physicists will flip the switch on a gigantic particle accelerator–the Large Hadron Collider. Skeptics fear this will be the end of the earth, scientists say that planetary annihilation is unlikely. For a reality check we turn to the rock star of all things physics, Brian Greene. Guest: Brian Greene, physicist, author of ?The Elegant Universe,? which was also a WGBH-produced NOVA mini-series on PBS. He has a new book out: ?Icarus at the Edge of Time.”