This hour explores some of the fundamental mysteries of life - from how it first started on Earth to the possibility of supremely intelligent life on other planets and why technology is evolving like life itself. We begin with a rare recording of Nobel Prize winning physicist Edwin Schrodinger and comments on his book "What Is Life?" from Nobel Prize winning biologists James Watson and Harold Varmus. We also hear from Ken Miller, co-author of the most widely used biology textbook in American high schools, and Craig Venter, widely regarded as one of science's leading innovators. Venter, who's come as close as anyone has to creating life in a test tube, tells Steve Paulson what drives him. And we hear from some ordinary people about what they think life is.