climatic changes and hunting by humans probably contributed to the extinction of this species at the end of the Pleistocene

which is impressive for a Triassic reptile

Dimetrodon was not a dinosaur

flapped its wings frantically trying to evade the predator

the scene descends into a frenzy of violence

Guanlong wucaii Torosaurus climatic changes and hunting byGuanlong wucaii was a carnivorous dinosaur that lived during the Late Jurassic period, approximately 156 million years ago, in the Oxfordian, in what is now Asia. This dinosaur is notable for being one of the first known members of the tyrannosauroid group, the precursors of the famous Tyrannosaurus rex. In terms of size, the Guanlong wucaii was relatively small compared to its better known descendants. Fossils indicate that it reached a length of