Dinosaursby Scott Steedman, Carolyn Scrace (Illustrator)
The Dinosaur Age (the Mesozoic era) began 225 million years ago. At that time the earth was covered in thick forests, dusty plains, and shallow seas. The climate was much hotter than it is now. There were no mammals or birds. The first dinosaurs searched for food among the shrubs and trees. The dinosaurs were reptiles, and today's snakes and crocodiles with their scaly skin are close relatives. Dinosaurs survived on Earth for the next 160 million years.
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