Dinosaur World An Introduction to dinosarus and Prehistoric life

[box, inside front cover] Life on Earth began about 3.5 billion years ago. For the first 2.5 billion years, there were only simple, single-cell bacteria. About 1,000 million years ago the first complex cells with a nucleus appeared. About 500 million years later, multi-celled animals with legs and eyes appeared. 250 million years ago dinosaurs ruled the Earth until they died out some 65 million years ago. Before the Dinosaurs4,600248 million years ago The First Dinosaurs248205 million years ago Jurassic Dinosaurs205144 million years ago Rule of the Dinosaurs14475 million years ago The Last Dinosaurs7564 million years ago After the Dinosaurs64 million years agotodayTwist, Clint is the author of 'Dinosaur World An Introduction to dinosarus and Prehistoric life' with ISBN 9780764178252 and ISBN 0764178253.