Frankfurt am Main - Senkenberg Museum - Tyrannosaurus Rex 02
Tyrannosaurus rex was among the greatest predators that ever lived on land. It made a spectacular appearance in the film "Jurassic Park". Like all predatory dinosaurs, it ran on its hind legs. New studies suggest that it was not very fast. The short arms had only two fingers. It can be that the dinosaur needed them to stand erect.
The largest Tyrannosaurus that has ever been found, had a skull length of 1.5 meters. In its mouth
were 58 teeth with serrated edges, which could be up to 30 centimeters long, including the roots. Any broken teeth could always be replaced by re-growing ones. It is not clear just how much Tyrannosaurus hunted other dinosaurs, such as the Triceratops, or only ate carrion.
It is possible to tell whether the skeleton is that of a Tyrannosaurus male or a female specimen, from the first caudal vertebra. In female crocodiles, the lower vertebrate extension (the hamael arch) is smaller than on the lower vertebrae to allow more space for her to pass the eggs. Tyrannosaurus-like dinosaurs (Tyrannosauridae) were common in North America and Asia.