Many years ago, dinosaurs of great height and strength used to roam the Gobi. Archaeologists have discovered many bones of ancient dinosaurs such as the Tarbosaurus and the Psittacosaurus, the smallest plant-eating dinosaur in the world. Another amazing dinosaur that was discovered is called the Gamillimimus, a bird like dinosaur that archaeologists call a "chicken mimic," has a toothless beak and long arms to grasp their pray. The Tarbosaurus is a relative to the Tyrannosaurus Rex. It has muscular hind legs, sharp, and pointed teeth, and huge jaws. The Velociraptor is a birdlike dinosaur like the Gamillimimus, except it is more aggressive. This dinosaur liked to attack dinosaurs that were bigger than itself. The Velociraptor is light and fast with strong arms, claws, and sharp teeth.