Jeffrey Bennett received a B.A. in biophysics from the University of California, San Diego (1981) and a Ph.D. in astrophysics from the University of Colorado, Boulder (1987). He currently spends most of his time as a teacher, speaker, and writer. He has taught extensively at all levels, including having founded and run a science summer school for elementary and middle school children. At the college level, he has taught more than fifty classes in subjects ranging from astronomy, physics, and mathematics, to education. He served two years as a visiting senior scientist at NASA headquarters, whe...