This week Greg's guest will be Dr. Lawrence Krauss, live!

Dr. Krauss is a theoretical physicist at Arizona State University where he is the director of that school's Origins Project, "a national center for research and outreach on origins issues, from the origins of the universe, to human origins, to the origins of consciousness and culture." His research interests include "the interface between elementary particle physics and cosmology, where his studies include the early universe, the nature of dark matter, general relativity and neutrino astrophysics." He gained widespread notoriety on the internet when, posted to YouTube, was a video of his 2009 AAI talk, "A Universe From Nothing"; a video that explained why the question "what came before the universe?" doesn't demand the answer theists pretend it does. This talk is to become the basis for a book set for release in early 2012.

Dr. Krauss is a best-selling author of The Physics of Star Trek, and Atom: A Single Oxygen Atom's Journey from the Big Bang, to Life on Earth...and Beyond. His new book Quantum Man, about the life and work of Richard Feynman, is out now.

Dr. Krauss sits down to talk with us on the heels of his debate with Christian apologist William Lane Craig.

Remember to RSVP at the event page for this episode and please join us!