STEPHEN HAWKING held the post of Lucasian Professor of Mathematics at Cambridge, the chair held by Isaac Newton in 1663, for thirty years. Professor Hawking is now Director of Research for the Centre for Theoretical Cosmology at the University of Cambridge. He has over a dozen honorary degrees, and was awarded the Companion of Honour in 1989. He is a fellow of the Royal Society and a member of the US Natonal Academy of Science. His books include the bestselling A Brief History of Time, Black Holes and Baby Universes and Other Essays, The Universe in a Nutshell and A Briefer History of Time. Stephen Hawking is regarded as one of the most brilliant theoretical physicists since Einstein. He lives in Cambridge. B> hysicist LEONARD MLODINOW has taught at Cal Tech, written for Star Trek- The Next Generation, and is the author of Euclid's Window, Feynman's Rainbow and Some Time with Feynman.