Reknowned astrobiologist and curator of astrobiology at the Denver Museum of Science and Nature, and author of the book Lonely Planets: The Natural Philosophy of Alien Life David Grinspoon joins me in the studio for a fascinating tour of science's search for life in the universe. From little green men to undersea worms to the intersection of science and philosophy in our quest to understand our own origins, Grinspoon guides us through a tour of nearby planets, moons and distant, exo-gallactic planets that just might (statistically speaking) be a home for life other than our own. Also joining us for the discussion is four-time shuttle astronaut and planetary scientist Thomas D. Jones, who shared an advisor with Grinspoon during their graduate studies, and Popular Mechanics senior science editor Jennifer Bogo. Less