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It was the dawn of a blue planet two hundred and thirty-five million years ago. Around the globe, dinosaurs were taking dominion over their territory. Discover their confidence hundreds of millions of years ago as they roamed the land, certain that they could never die. These fascinating creatures multiplied in large numbers, developed into numerous species, and spread to all corners of the earth over the course of three geological periods. Read about the Triassic, Jurassic, and Cretaceous dinosaurs' lives and evolution over time. Age of Dinosaurs will transport you to a time before mammals and humans existed. With its full-color illustrations of the world of dinosaurs before we knew it, this first volume from the PNSO Field Guide to the Ancient World will inspire dinosaur enthusiasts everywhere!