Dinosaur
Dinosaurs are a catagory of creatures of the Clade Dinosauria, which existed from 230 Million Years ago in the Triassic period. Dinosaurs came to be the dominant form of large scale land dwelling life forms across all of earth's major continents through the Jurassic and Cretaceous period. Most lines of dinosaurs, however were extinguished during the Cretaceous–Paleogene extinction event some 66 million years ago.
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