JAMES TREFIL is a professor of physics at George Mason University. He has written more than 50 books about science for the general audience and has served as Contributing Editor for Science for USA TODAY Weekend and as a regular contributor and science consultant for Smithsonian and Astronomy magazines. SHOBITA SATYAPAL is Professor of Physics and Astronomy at George Mason University. She received the NASA Presidential Early Career Award for her work on infrared spectroscopy and instrumentation. Her research centers on understanding the connection between the growth and evolution of supermassive black holes and the host galaxies in which they reside.
