Dinosaurs are prehistoric animals that roamed longer than many other species, 165 million years. Their reign started in the early Triassic period around 225 million years ago; only to later end in the late Cretaceous 65 million years ago. Dinosaurs have always been a wonder to the world, scientists and paleontologists work together to uncover the mystery of many species. (Planet Dinosaur explains the latest discoveries). The only living Dinosaurs are Birds, which belong to the Theropod group (which included giants, like Tyrannosaurus and Allosaurus)
Also Planet Dinosaur is based on the dinosaur species.
The vast mojority of dinosaur species were big or even huge, the different types that appared in Planet Dinosaur are here:
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