As real as it gets! Based on one of the most ambitious television ventures ever undertaken, Walking With Dinosaurs: A Natural History takes you back to a time when super-beasts ruled the world. This full-color, hardcover edition captures the awesome nature of the Discovery Channel program in 288 action-packed pages. Through expertly-written text and state-of-the-art computer graphics, this book vividly depicts the age of the dinosaur. More than 225 million years ago, in the middle of the Triassic period, dinosaurs began to roam the Earth. But 170 million years later they had disappeared. How and why this happened continue to be among the world's greatest mysteries. The dinosaur era was one of the most amazing periods in the Earth's history.