One of our most distinguished scientists offers a radical new theory of the origin, and ultimate end, of the Universe. Professor Sir Roger Penrose's groundbreaking and bestselling The Road to Reality provided a complete guide to the laws that govern our universe. In Cycles of Time, Penrose offers a completely new perspective on the often-asked question, 'what came before the Big Bang?' The answer that Penrose proposes involves a curious but fully rational way of looking at the expected ultimate fate of our acclerating expanded universe, and showing that its end can in fact be reinterpreted as the 'Big Bang' of a new universe.