We had Lawrence Krauss on Point of Inquiry less than a year ago, to discuss his recent book on the scientific works of Richard Feynman.

But in order to keep up with him, we had to have him on again. Already.

You see, Krauss has a new book out that’s causing quite a stir right now—A Universe from Nothing: Why There is Something Rather than Nothing.

Here’s a hint as to why: Krauss’s answer to this age-old question isn’t God. In fact, as discussed on the program, Krauss has arguably written the book that “kicks God out of physics.”

And along the way, he also manages to explain a heck of a lot of science.

Lawrence Krauss is an the internationally known theoretical physicist and popular author. He has published hundreds of scientific papers, as well as acclaimed books like the bestselling The Physics of Star Trek and Fear of Physics. He’s director of the Origins Project at Arizona State University.