Dinosaur T-Rex

Tyrannosaurus lived throughout what is now western North America. Fossils are found in a variety of rock formations dating to the Maastrichtian age of the upper Cretaceous Period, 68 to 66 million years ago.

Tyrannosaurus rex mounted on two feet, in a stalking position, with its head low, tail extended, and one foot slightly raised. While its huge jaws and its strong legs would certainly be forceful hunting weapons, Tyrannosaurus rex's arms were too short to reach its mouth, and its hands had only two fingers instead of three, making it unable to grasp.

The most complete specimen measures up to 12.3 m to 13.2m(40 ft) in length though T. rex could grow to lengths of over 12.3 m (40 ft), up to 3.66 meters (12 ft) tall at the hips, and according to most modern estimates 8.4 metric tons (9.3 short tons) to 14 metric tons in weight

More than 30 specimens of Tyrannosaurus rex have been identified, some of which are nearly complete skeletons. Soft tissue and proteins have been reported in at least one of these specimens. As the archetypal theropod, Tyrannosaurus is one of the best-known dinosaurs since the 20th century.