This guide covers over 600 species from predatory dinosaurs to primitive amphibians, from giant armoured fish to mammoths and sabertooths. Accompanying each illustration are biographies of the creatures, detailing how these animals moved, behaved, and what they ate. Where possible, significant comparisons are made with familiar living animals to highlight the process. The book also contains spreads on how fossils are made, how they are discovered, and the process of evolution.