Jim Bell is a professor of astronomy and planetary science in the School of Earth and Space Exploration at Arizona State University. His research focuses on the geology and composition of planets, moons, asteroids, and comets, and he has authored seven popular science books.
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Historian William Sheehan and astronomer and planetary scientist Jim Bell combine their talents to tell a unique story of what we've learned by studying Mars through evolving technologies. What the eye sees as a mysterious red dot wandering through the sk... SEE MORE