The age of the dinosaurs was called to the Mesozoic Era, divided into three periods; Triassic (250-144 million years ago), Jurassic (144-90 million years ago) and the Cretaceous (90-65 million years...
Non-avian dinosaurs existed from around 230 million years ago in the Triassic period until the end of the Cretaceous period, 65 million years ago. The cause of their extinction is most likely an...