Most people have watched the film series Jurassic Park and are impressed by the various dinosaurs in the films. Dinosaurs were the absolute dominators on the earth. Most of them have robust limbs, long tails and large bodies. They are oviparous animals, similar to the birds and lizards we see today. They lived on the earth for more than 100 million years, but suddenly became extinct at the end of the Cretaceous Period 65 million years ago.
中国科普博览 发布时间 2017-09-30