<教學文章> T-Rex

Post date: Jul 4, 2012 5:29:52 PM

Dinosaurs lived a long time ago before humans were around. Skeletons tell us what shape they were. Little is known about their daily lives. Looking at what they ate helps us to know more about them. Researchers have found teeth marks of one dinosaur on the bones of another dinosaur. A large dinosaur known as Tyrannosaurus Rex, or T-Rex, made teeth marks on the bones of a smaller dinosaur. There were many marks on the bones suggesting that the dinosaur kept chewing on the bones.

The bones of a T-Rex were found 65 million years after they all died and became extinct. People did not know if it killed what it ate or only ate already killed animals. Scientists found that the bite of a T-Rex was strong enough to kill another animal. This does not prove that he tracked and killed his food himself. It does show that he could use his bite to kill other animals.

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More Information

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. The abundance of fossil material has allowed significant research into many aspects of its biology, including life history and biomechanics. The feeding habits, physiology and potential speed of Tyrannosaurus rex are a few subjects of debate. Its taxonomy is also controversial, with some scientists considering Tarbosaurus bataar from Asia to represent a second species of Tyrannosaurus and others maintaining Tarbosaurus as a separate genus. Several other genera of North American tyrannosaurids have also been synonymized with Tyrannosaurus.