Dinosaurs were the rulers of the earth billions years ago. Fierce predators with no mercy ruled the world. The king of all dinosaurs was Tiranozaurus Rex aka T-Rex- the predator of predators. T-Rex's tooths were the size of a kitchen knife!
Dinosaurs disappeared in an awful way: an asteroid hit Terra. Nowadays we still see creatures like sharks, birds,crocodiles and snakes- the successors of the precedent rulers of the Earth.
