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 | Subject: T. rex's oldest relative discovered  Wed Nov 04, 2009 11:07 pm | |
| from msnbc.com Study suggests tyrannosaurs started small, then were super-sized
- Quote :
- By Jeanna Bryner
updated 1 hour, 50 minutes ago
Spanning just 10 feet in length and sporting a tiny horn on its nose, a newly identified dinosaur has been identified as the oldest known relative of the fierce meat-eater Tyrannosaurus rex. The discovery suggests such tyrannosaurs were quite petite before they evolved into giant killing machines just before their demise.
The dinosaur, called Proceratosaurus, lived 170 million years ago. "We can say conclusively it's the earliest representative of the line of evolution that led to Tyrannosaurus," said study researcher Angela Milner of the Natural History Museum in London.
The group of huge carnivores called tyrannosaurs ruled the land about 85 million to 65 million years ago, when a mass extinction event wiped them out along with most dinosaurs and many other animals and plants. http://www.msnbc.msn.com/id/33628218/ns/technology_and_science-science/ | |
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