MICHIO KAKU is the Henry Semat Professor of Theoretical Physics at the Graduate Center of the City University of New York. He is the cofounder of string field theory. He has written several books, including Parallel Worlds and Beyond Einstein, and his bestseller, Hyperspace, was voted one of the best science books of the year by the New York Times and the Washington Post. He is a frequent guest on national TV, and his nationally syndicated radio program is heard in 130 cities. He lives in New York City.