Tyrannosaurus rex was active in present-day North America during the Cretaceous period. They have large and strong bodies, with short and thick necks, strong and thick hind limbs, but very short forelimbs. The head is long and narrow, the cheeks are muscular, with a large upper and lower jaw, and a large open mouth with sharp teeth about 15 cm long inside. The tail is long and thick, and it looks like a powerful offensive and defensive weapon. The Tyrannosaurus Rex walked on two legs and could run very fast, reaching speeds of up to 30 miles per hour. It has a good sense of sight and smell. The head of the tyrannosaur was large, and it was a clever dinosaur.
Tyrannosaurus rexes live alone, sometimes with another tyrannosaur. We don't know if they will take care of their own children. A ferocious carnivorous dinosaur. It is the largest known terrestrial carnivorous meat, with a body length of 15 meters, a head alone of 1.5 meters long, and a height of 6 meters. The skull is bulky, tall and flattened, with two large anterior foramen and oval orbits. There are coarse traces of fixed ligaments between the dental bone, the hip bone and the anterior joint bone, and the neck bone is short, with 9 to 10 cervical vertebrae, and its structure is characterized by a short and wide type. The shoulder straps are degenerate, the shoulder blades are slender, and the humerus is short, only half as long as the shoulder blades. The forefoot is degenerated and weak, with only two fingers, and may also have a third finger. The girdle of Tyrannosaurus is very developed and extremely compact, not only the intestinal bone and the shoulder vertebra are closely healed, but also the ischia and the distal end of the pubic bone are also close to each other; the distal pubic bone is enlarged and thickened into a foot-like process, while the distal ischia is rod-shaped. Such a thick belt structure indicates that its hind limbs are strongly moved. Tyrannosaurus rex lived mainly in hilly areas, preying on plant-feeding reptiles. Due to changes in the surrounding living environment, Tyrannosaurus rex was extinct in the late Late Cretaceous.
Some paleontologists believe that although the ears of tyrannosaurs are similar in appearance to other dinosaurs, their internal structure is very different, they hear a wider range of sounds, they can collect sounds in specific directions, and perhaps they can hear low-frequency sound waves that are difficult for other dinosaurs to hear. In addition, Tyrannosaurus rex has a keen sense of smell, which is easy to hunt. Also, the jaws of tyrannosaurs could be wide open. In addition, like other predators, their teeth are bent backwards and the tip of their teeth is facing the center of the mouth, which means that prey can only escape in the direction of the throat when struggling in their mouths. The most important problem is that the teeth of the tyrannosaur had deep roots, such teeth were strong and not easy to break, and could easily bite through the bones. In short, the dragon's sense of hearing and smell is very sensitive, both jaws and teeth can be used as offensive weapons, and hunting herbivorous dinosaurs is a breeze.
Tyrannosaurus rex was bipedal and lived mainly in a vast area of western North America at the end of the Cretaceous period 0.65 billion years ago. At present, scientists still question whether the tyrannosaurus is a slow-moving scavenger or a quick-moving predator, but whether its food is alive or dead, the prey in its mouth must be very large, and this carnivorous dinosaur must have been very bloody when eating.