Stephen Hawking ... " ... has overcome a crippling disease to become the supernova of world physics. Unable to write, or even speak clearly, he is leaping beyond the big bang, to the dance of geometry that created the universe." --Timothy Ferris, Vanity fair. " ... can explain the complexities of cosmological physics with an engaging combination of clarity and wit ... His is a brain of extraordinary power." --The New York review of books. " ... clearly possesses a natural teacher's gifts--easy, good-natured humor and an ability to illustrate highly complex propositions with analogies plucked from daily life." --The New York times.