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Dinosaurs: Facts about the reptiles that roamed Earth more than 66 million years ago
Dinosaurs belong to a group of animals known as archosaurs, which also includes modern-day animals such as birds and ...
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What are dinosaurs?
Dinosaurs are archosaurs, a larger group of reptiles that first appeared about 251 million years ago, near the start of the Triassic Period. Some other non-dinosaur reptiles are also archosaurs, ...