Fast Facts Edit
- Type: Tyrannosaur Dinosaur
- Diet: Carnivore
- Size: 45 ft (14 m) long; 15 to 20 ft (4.6 to 6 m) tall
- Protection status: Extinct
- Did you know?
- Tyrannosaurus rex means "tyrant lizard king."
- T.Rex existed for about 10 million years.
The first reasonably complete Tyrannosaurus rex skeleton was discovered by palaeontologist Barnum Brown in Hell Creek, Montana in 1902. Until this find only fragments had been unearthed. In all, over 20 individuals have been found, although, only three have complete skulls. Remains have been discovered from Alberta to New Mexico, all from rocks of the late Cretaceous period.
Tyrannosaurus rex was the 4th largest of the "lizard-hipped" carnivorous dinosaurs known as theropods. It was a massive two legged predator with apowerful tail, large head and tiny arms.
Tyrannosaurus rex's primary weapon was its mouth, with a 1.2 metre long jaw and a 1 metre gape. Its curved serrated teeth were longer than a human hand. With these it could puncture an animal's organs, before tearing the flesh off. The Tyrannosaurus rex could not chew, so had to swallow its food whole. It could probably gulp up to 70 kilograms in one go. One fossil shows the danger of this - a large carnivore had died swallowing, with two long bones stuck in its gullet.
It's tiny two-fingered arms seemed very small, but were believed to have been at least three times as strong as human arms. They were too short to reach it's mouth, but were probably used as meat-hooks. There is clear evidence that tyrannosaurs rex fought one another from tooth-marks left in fossil remains.
Tyrannosaurs Rex Edit
70 to 65 million years ago Late Cretaceous period
Tyrannosaurus rex was one of the largest meat-eating dinosaurs that ever lived. Everything about this ferocious predator, from its thick, heavy skull to its 4-foot-long (1.2-meter-long) jaw, was designed for maximum bone-crushing action.Fossil evidence shows that Tyrannosaurus rex was about 45 feet (14 meters) long and about 15 to 20 feet (4.6 to 6 meters) tall. Its strong thighs and long, powerful tail helped it move quickly, and its massive 5-foot-long (1.5-meter-long) skull could bore into prey.
T. rex's serrated, coniail teeth were most likely used to pierce and grip flesh, which it then ripped away with its brawny neck muscles. Its two-fingered forearms could probably seize prey, but they were too short to reach its mouth.
Scientists believe this powerful predator could eat up to 500 pounds (230 kilograms) of meat in one bite. Fossils of T. rex prey, including Triceratops and Edmontosaurus, suggest T. rex crushed and broke bones as it ate, and broken bones have been found in its dung.
Tyrannosaurus rex lived in forested river valleys in North America during the late Cretaceous period. It became extinct about 65 million years ago in the Cretaceous-Tertiary mass extinction.
Info sourced from Several sites