Michio Kaku is the Henry Semat Professor of Theoretical Physics at the CUNY Graduate Center, a leader in the field of theoretical physics, and cofounder of string field theory. He is the author of several widely acclaimed science books, including Parallel Worlds, Visions, Beyond Einstein, Hyperspace, and Physics of the Impossible--the basis for his Science Channel TV show, Sci Fi Science: Physics of the Impossible--and the host of two radio programs, Explorations and Science Fantastic. His books have been translated all over the world. He has written for Time, The Wall Street Journal, The New York Times, Discover Magazine, The London Daily Telegraph, New Scientist Magazine, and other periodcals.