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T. Rex
Mesozoic Era
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But putting dinosaurs back together is about more than just reconstructing skeletons. We need to work out how they stood, how they moved and even understand the details of their physiology. And that's not something that's easy to get right. For example, we used to think that T. Rex held its head high, with its tail dragging along the ground. We saw it as a cold-blooded, lizard-like creature. It wasn't until recently that T. Rex became a forward-thrusting aggressor, so fast it could apparently outrun a car. So how did a T. Rex stand? And was it really that quick?
Palaeontologists now have access to an incredible set of clues that can help us understand the posture and movement of dinosaurs. It's a set of clues that can tell us what they might have looked like in the flesh, a set of clues that can even shed light on how quickly they might have run and a set of clues that we all see every day.
Birds are the living descendants of a dinosaur because dinosaurs have living descendants. Dinosaurs are not extinct. They did not become extinct at the end of the Mesozoic Era.

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