The Tyrannosaurus rex (T-Rex) was a dinosaur that lived about 65 million years ago at the end of the cretaceous period. The Tyrannosaurus rex is possibly the most well-known dinosaur because of its huge size and ferocious nature. The Tyrannosaurus rex was a meat-eater (called carnivores) and walked on two feet. This made them faster and left their hands free to grab their prey.
The name "Tyrannosaurus" comes from the Greek words meaning ‘tyrant lizard’. The word ‘rex’ means ‘king’ in Latin. The Tyrannosaurus rex was 42 feet long, 13 feet wide, and could weigh up to 7 tons. The skull of a Tyrannosaurus rex alone measured up to 5 feet long. The Tyrannosaurus rex lived in an area that now makes up western North America.
Many kinds of dinosaurs roamed the Earth for 165 million years. Sadly, dinosaurs became extinct at the end of the cretaceous period. Many people believe that dinosaurs became extinct after a giant asteroid struck planet Earth sixty-five million years ago.
Triceratops were dinosaurs that lived in the late cretaceous period around 65 million years ago. The Triceratops is well-known thanks to the three horns found on its face and body and the unique frill around its head. The triceratops was a plant-eating dinosaur (called herbivores) that walked on four feet to better carry its heavy body.
The name ‘Triceratops’ comes from the Greek language, with ‘tri’ meaning three and "keratops" meaning horned face. It is believed that fully grown Triceratops were about 26 feet long, 10 feet tall, and weighed about 9 tons. Triceratops had the biggest skull of any other dinosaur. The skull was up to 6½ feet long. The first known Triceratops fossils were found in North America near Denver, Colorado, in 1887.
Dinosaurs became extinct by the end of the cretaceous period. The extinction marked the end of the "Age of Reptiles" and the beginning of the "Age of Mammals". Some scientists think that the dinosaurs became extinct because of many volcanic eruptions and disease over a long period of time.