Dr. Jim Bell is a professor of geology and planetary science in Arizona State University's School of Earth and Space Exploration in Tempe, AZ, and an adjunct professor in the Department of Astronomy at Cornell University in Ithaca, NY. Jim is a member of the American Geophysical Union and the Geological Society of America. As President of The Planetary Society, he is a prolific public commentator on science and space exploration, earning the 2011 Carl Sagan Medal from the American Astronomical Society for excellence in public communication of planetary science. Jim has appeared on numerous radio and television shows, including NBC's Today Show and PBS's NewsHour, as well as programs on the Discovery, National Geographic, and History cable channels, and has been interviewed for several space-related documentary films. He is the author of The Ultimate Interplanetary Travel Guide, The Space Book, Mars 3-D, Moon 3-D, The Interstellar Age, and Postcards from Mars.