Prehistory has never been more exciting: New discoveries are overturning long-held theories left and right. Stone tools in Australia date back 65,000 years-a time when, we once thought, the first Sapiens had barely left Africa. DNA sequencing has unearthed a new hominid group-the Denisovans-and confirmed that crossbreeding with them (and Neanderthals) made Homo sapiens who we are today. A Pocket History of Human Evolution brings us up-to-date on the...