Dinosaur (English Name: dinosaur) refers to the recent common ancestor and all descendants of Triceratops, modern birds and Lianglong.
For the convenience of research, dinosaurs can be divided into birds and non birds dinosaurs. Among them, non bird dinosaurs only lived in the Mesozoic (Triassic, Jurassic and Cretaceous) and became extinct 65 million years ago. This entry mainly introduces non bird dinosaurs.
Vigorous limbs, long tail and huge body are the portrayal of some non bird dinosaurs. They mainly inhabit in the forest or open areas on the lake shore plain (or coastal plain).
In 1841, when British scientist Richard Owen studied several fossilized lizard bones, he thought they were left by some prehistoric animals and named them dinosaurs, which means "terrible lizards".