This dinosaur encyclopedia takes kids back to the Mesozoic era - known as the Age of the Dinosaurs - to explore the prehistoric life that ruled the Earth.Knowledge Encyclopedia Dinosaur!, which is for children aged between 8+, explores how the dinosaurs of the Triassic, Jurassic, and Cretaceous Periods evolved, lived, and died in the great dinosaur extinction event that occurred approximately 66 million years ago.It covers all you need to know about dinosaurs such as Tyrannosaurus rex, Stegosaurs, and Velociraptor, but also includes marine reptiles, massive mammals like the woolly mammoth, and the pterosaurs. Each creature has its own feature, which brings together the latest information fro