When did the first T-Rex appeared on earth?

Answer 1

T-Rex is the short form on Tyrannosaurus. The first T-Rex appeared on earth during the early Cretaceous about 137 million years ago. "T-Rex" means the king of the dinosaurs. They were carnivorous and mainly eat smaller dinosaurs.

Answer 2

Dinosaurs were first evolved in South America. The earliest known dinosaur to live was the Eoraptor.