The dinosaurs have lived for 250 million years. The last period of dinosaurs were the cretaceous period. Some of the animals or dinosaurs that lived in the cretaceous period are: Tyrannosaurus Rex, Triceratops,Spinosaurus, and the Utah Raptor. The Tyrannosaurus name means tryant lizard and the Brachiosaurus means thunder lizard. Dinosaurs are huge mutant lizards. Here are some pictures of dinosaurs...
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