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The term Dinosauria refers to a nearly extinct group of vertebrates. This group arose from the reptiles in the late Middle Triassic Period and flourished from 240 to 65 million years ago during the Mesozoic Era. You can learn more about the Dinosauria in this lesson. This resource is part of the Biology Links for One Laptop Per Child course which contains units on Exploring Life; The Cell; Genetics; Mechanisms of Evolution; The Evolutionary History of Biological Diversity; Plant Form and Function; Animal Form and Function; Ecology; and Astrobiology.
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