Since the dinosaurs died out over 65 million years ago the Earth has been dominated by mammals. A succession of bizzare evolutionary specimens have come and gone, from walking whales to sabre-toothed cats. This book recreates spectacular and unfamiliar creatures in the context of their world. The book reveals the ancestors of modern mammals and the arrival of man, and transports the reader to the icy plains of the mammoth, dark forests stalked by giant carnivorous birds and deserts dominated by 15 tonne Indricotheres.