Dinosaurs were animals that ruled the world, before they became extinct. Some dinosaurs were really short, while others are way taller than a human.
Dinosaurs can be classified into many groups. An example of this are Raptors. Raptors are very smart. Be careful!
Birds are descended from a group of dinosaurs called 1 .
One dinosaur has been known as the king of all dinosaurs. But, that does not mean it is the biggest dinosaur.