The Cretaceous Period is the third and last period of Mesozoic Era (The Age of The Dinosaurs). This is or was the time of different dinosaurs like Triceratops, Iguanodon, Velociraptor, and T-Rex. At the end of Cretaceous Period, 66 million years ago, all non-avian dinosaurs died out, but the small feathered dinosaurs survived and evolved into Birds.

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