Is the appearance of life on Earth a fluke, or is the universe teeming with alien life? In a special broadcast from the Origins Symposium at Arizona State University, leading astrobiologists debate the origin of life on this planet and talk about the best places to look for other life in the universe.
Ariel Anbar, principal investigator, NASA Astrobiology Institute team, professor, Arizona State University, Tempe , Ariz.
Barry Blumberg, M.D., winner, 1976 Nobel Prize in Physiology or Medicine, founding director, NASA Astrobiology Institute, senior advisor to the President, Fox Chase Cancer Center, Philadelphia, Penn.
Paul Davies, cosmologist, physicist, astrobiologist, director, The Beyond Center, Arizona State University, Tempe, Ariz.
Peter Ward, professor, department of biology, The Astrobiology Program, The University of Washington, Seattle, Wash.