Dinosaurs roamed the Earth over 200 million years ago and were the dominant terrestrial vertebrate for 135 million years. It is believed their extinction came about because of changes in the climate they couldn’t adapt to. Birds are the closest relative to a dinosaur that we have.
Let's take a look at 10 most interesting information about Dinosaurs:
1. Dinosaurs walked the earth for over 165 million years. They lived during a period of time known as the Mesozoic Era, or Age of Reptiles.
2. At the end of the Cretaceous Period they became extinct – that was around 65 million years ago. During this time there was a great deal of volcanic activity and many earthquakes.
3. Many people believe that dinosaurs became extinct because an asteroid hit the earth changing the climate dramatically. It is believed that dinosaurs couldn’t adapt to these changes.
4. The word dinosaur means terrifying lizard. This name was invented by Sir Richard Owen in 1842.
5. The oldest known dinosaur is Eoraptor, a meat-eater that lived 228 million years ago.
6. The vast majority of dinosaurs were plant eaters. Fierce carnivores like Tyrannosaurus Rex and Giganotosaurus get all the press, but it's a fact of nature that the meat-eating "apex predators" of any given ecosystem are tiny in number compared to the plant-eating animals on which they feed.
7. It's true, some plant-eating dinosaurs (like Stegosaurus) had brains so tiny compared to the rest of their bodies that they must have been only a little bit smarter than giant ferns. But meat-eating dinosaurs large and small, ranging from Troodon to T. Rex, possessed more respectable amounts of grey matter compared to their body size, since they required better-than-average sight, smell, agility and coordination to reliably hunt down prey.
8. Dinosaurs are classified as reptiles. They are divided into two groups based on the structure of the hip. One group has lizard-like hips and the other group has bird-like hips. Most dinosaurs hatch from eggs, and they could not fly or live in water.
9. The biggest dinosaurs were over 100 feet long and 50 feet tall, the Sauropod was the largest dinosaur. The smallest dinosaurs were the size of a chicken and were called Mussaurus.
10. The color of all dinosaurs is unknown because no one was alive at that time in history. There are currently over 330 described dinosaur species and this number is growing.