The title 'Prehistoric Creatures of Planet Earth' sounds like a Science Fiction 'B' movie. But the reality is giant monsters and ancient beasts lived in the seas, on land and in the skies of a prehistoric world we today call home. Explore our prehistoric past through books, DVD's, museums and websites like this one. Here are some fun facts about some of the more popular Ancient Mammals, Ornithopods, Pterosaurs, Sauropods and Theropods with artwork by Joe Tucciarone.