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 Cretaceous–Paleogene extinction event led to the extinction of most dinosaur groups at the close of the Mesozoic Era. Dinosaur Wallpapers In HD,Dinosaur Pics In HD, Dinosaur Pictures In HD, Dinosaur So Real Pics, Dinosaur 3d Wallpapers, Dinosaur Cartoons, Dinosaur Images, Dinosaur Pics For Desktop, Dinosaur Pictures For Mobile, HD wallpapers, New Amazing Wallpapers In HD.Äinosaurs are a diverse group of animals of the clade Dinosauria.
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