Probably the most famous of all dinosaurs, T. rex was probably the fiercest meat eater that ever lived. At more than 40 feet tall, it was huge and had the most powerful head of any dinosaur. It also had the biggest teeth of any dinosaur - teeth that were not only sharp and cutting edged, but also thick and strong, capable of crushing bones.

After many millions of years of evolution, nature arrived at T. rex, an almost perfect killing machine. It was capable of running at great speed to catch other dinosaurs (or anything it wanted to eat). It had large feet to help it run quickly through the swampy environment in which it lived, maybe as fast as 35 mph. Although it had very short arms, they were very strong. But it didn't need its arms to be an effective and efficient killer. It had enormous strength in its jaws; it could bite right through the frill of a Triceratops or into the back of a hadrosaur . In fact, the only thing that a T. rex had to fear was another T. rex. Most of the scars and wounds found on fossil bones of these great creatures seem to come from others of its kind.

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