Book excerpt: Stephen W. Hawking, widely believed to have been one of be one of the world’s greatest minds, presents a series of seven lectures— covering everything from big bang to black holes to string theory—. These lectures not only capture the brilliance of Hawking’'s mind, but his characteristic wit as well. In The Illustrated Theory of Everything, Hawking begins with a history of ideas about the universe, from Aristotle’s determination that the Earth is round to Hubble’s discovery, more than 2,000 years later, that the universe is expanding. Using that as a launching pad, he explores the reaches of modern physics, including theories on the origin of the universe (e.g., the Big Bang), the nature of black holes, and space-time. Finally, he poses the questions left unanswered by modern physics, especially how to combine all the partial theories into a “unified theory of everything.” “If we find the answer to that,” he claims, “it would be the ultimate triumph of human reason.” A great popularizer of science as well as a brilliant scientist, Hawking believes that advances in theoretical science should be “understandable in broad principle by everyone, not just a few scientists.” In this book, he offers a fascinating voyage of discovery about the cosmos and our place in it. It is a book for anyone who has ever gazed at the night sky and wondered what was up there and how it came to be.