Robert Zubrin, formerly a senior engineer at Lockheed Martin, is the founder of Pioneer Astronautics, a space-exploration research and development firm. Currently president of the Mars Society, Dr. Zubrin lives with his family in Colorado.
Sean Runnette, a multiple AudioFile Earphones Award winner, has also produced several Audie Award-winning audiobooks. His film and television appearances include Two If by Sea, Copland, Sex and the City, Law & Order, Third Watch, and lots and lots of commercials.