Introducing the latest ideas on how life originated and diversified on earth, this new edition of a classic work provides a concise and engaging summary of modern evolutionary theory. The heavily illustrated book is intended for readers with little or no formal training in science and is an ideal introduction for students. Teachers of biology will also find the book a valuable reference text. Among the features of the second edition: * new chapters on neural evolution and gene evolution * explanations of the latest theories on the evolution of humans * extensive updates throughout, with emphasis on molecular evolution * many new or updated illustrations * comprehensive coverage, clear and concise presentation