Did you know: A shark as long as a bus roamed the oceans? Hamsters with horns once burrowed the Earth? Giant armadillos grew to the size of a family car? Find out about the fascinating prehistoric beasts that once walked, swam and hunted across the Earth. Compare these with their closest modern relatives, or other living animals with amazing features. From cow-sized rodents to furry prehistoric rhinos - packed with beautiful pictures and amazing facts, essential stats and scale diagrams, this is the ultimate guide to prehistoric beasts!