With brilliant CGI illustrations, fun diagrams and loads of humour, these four books answer, simply and honestly, the important and fascinating questions about life on Earth and how it evolved. THE RISE OF THE MAMMALS After the great extinction of the dinosaurs 66 million years ago, see how mammals begin to dominate on Earth. Many of these spectacular animals are now extinct, from the mighty creodont and smilodon to the giant indricotherium, which was twice the size of an elephant. And, of course this period saw the evolution of the most powerful mammal of all: Homo sapiens - man!