Guest Michael Marriot, NIRS, discusses the aftermath of the Fukashima accident.

Guests Dr. Richard Heinberg on Society in Collapse, and Eris Assadorian on the State of the World

Dr. Seth Shostak: Intelligent life on other planets?

Dr. Ray Kurzweil: Will the robots one day take over?

Guest 1: Dr. Simon Singh, "The Origin of the Universe"

Guest 2: Dr. Spencer Wels, "The Origin of the Human Race"

Today's first guest is NASA astronaut Dr. Tom Jones

Additionally, Dr. Robert Zubrin joins to discuss going to Mars