Tyrannosaurus Rex is a fierce carnivorous dinosaur. Survived in the late Cretaceous. It is the largest known terrestrial carnivore, with a body length of 15m, a head length of 1.5m and a body height of 6m. The skull is heavy, high and flat, with two big holes in front of the eyes and an oval orbit. Teeth are extremely developed. There are thick traces of movable ligament fixation between odontoid bone, epiphysis bone and anterior articular bone, and the neck bone is short, with 9 ~ 10 cervical vertebra. Its structural characteristics are short and wide. The shoulder strap degenerates, the scapula is slender, and the humerus is short, only half as long as the scapula. The forefoot has degenerated and thinned, with only two fingers, and the third finger may still be left. Tyrannosaurus rex's belt is very developed and compact. Not only the intestine and sacrum heal closely, but also the distal ends of ischium and pubis are connected with each other. The distal pubic bone expands into a cardioid process, while the distal ischium is rod-shaped. Such a thick band structure shows that its hind limbs are very active. Tyrannosaurus rex mainly lives in hilly areas and mainly preys on herbivorous reptiles. Due to the change of living environment, Tyrannosaurus rex became extinct in the late Cretaceous. Tyrannosaurus rex is like a bone crusher. Tyrannosaurus rex is a very deadly and ferocious dinosaur, and it deserves the "tyrant behavior" in the dinosaur world. Its huge jawbone and sharp teeth can disperse toothpick-sized prey. This dinosaur is huge, with a body length of 40 feet, a height of 20 feet, and a weight close to1.6000 pounds. At the end of Cretaceous 65 million years ago, Tyrannosaurus rex walked on two legs, mainly living in a vast area of western North America. At present, scientists still doubt whether Tyrannosaurus Rex is a slow-moving scavenger or an agile predator, but whether its food is alive or dead, its prey must be very large, and this carnivorous dinosaur must be very bloody when eating. Species classification order) → sauropod → theropod. → Neoheron suborder Neoheron suborder Tetanurae Cephalopoda Averopoda Averopoda Body Cavity Leo Osteosuborder Maniraptorifromes Chiroptera Tyrannosaurus Tyrannosaurus. → Tyrannosaurus) → Tyrannosaurus) → Tyrannosaurus 100.