Exploration

Guests: Dr. Seth Shostak and Dr. Ray Kurzweil Set Shostak speaks on contacting alien civilizations, while Ray Kurzweil poses the question "Will the robots take over?".

Guests: Dr. Joseph Romm and Travis Bradford Joseph Romm, author of "Hell and High Water", and Travis Bradford, author of "Solar Revolution"

Michio Kaku and Nobel Laureate Frank Wilczek discuss The Large Hadron Collider and unification in physics

Guest Dr. Peter Ward on the "Flooded Earth" and global warming.

Guest Dr. Robert Lanza on biotechnology, and Lester Brown on the state of the world.

Dr. Kaku discusses the book The Plot To Save The Planet with author Briam Dumaine.

Michael Marriot, of the Nuclear Information and Resource Service (NIRS), chats with Dr. Kaku about the future of Nuclear Energy.

Ex-US Airforce officers Mike Maggelet and James Oskins speak on top-secret US nuclear-weapons accidents.

Guests George Johnson, heroin of The Big Bang theory, and Michael Lemonick, on The Big Bang

Guest Lester Brown discusses the state of the world