Dinosaurs existed millions of years ago. They are a super fascinating group of animals. After all, they lived in an entirely different time than us and some of them were absolutely HUGE!
It is easy to think of some of the classic dinosaurs like tyrannosaurus rex, triceratops, stegosaurus, etc. But there are also so many more dinosaurs than the classics. Dinosaurs lived for almost 200 million years and they changed a lot over the time. As palaeaontologists (scientists who study ancient life) dig up more and more dinosaur fossils, they are learning all the time and discovering new things about how dinosaurs lived.