baby dinosaurs |
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| navigate by keyword : about ago and animals appeared are baby beginning clade close cretaceous dinosaur dinosauria dinosaurs diverse doll dominant during end era event extinction first for from group groups jurassic kids led mesozoic million most paleogene period terrestrial the they toy triassic until vertebrates were when years |
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| Dinosaurs are a diverse group of animals of the clade Dinosauria. They first appeared during the Triassic period, 231.4 million years ago, and were the dominant terrestrial vertebrates for 135 million years, from the beginning of the Jurassic (about 201 million years ago) until the end of the Cretaceous (66 million years ago), when the Cretaceousââ¬âPaleogene extinction event led to the extinction of most dinosaur groups at the close of the Mesozoic Era. |
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