LAWRENCE M. KRAUSS, a physicist/cosmologist, is Foundation Professor in the School of Earth and Space Exploration and Physics Department, and Inaugural Director of the Origins Initiative at Arizona State University. He is the author of The Fifth Essence, Quintessence, Fear of Physics, The Physics of Star Trek, Beyond Star Trek, Atom, Hiding in the Mirror, Quantum Man: Richard Feynman's Life in science, and A Universe from Nothing: Why There Is Something Rather Than Nothing.