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Warm and fuzzy T. rex? New evidence surprises

LOS ANGELES — The discovery of a giant meat-eating dinosaur sporting a downy coat has some scientists reimagining the look of Tyrannosaurus rex.

With a killer jaw and sharp claws, T. rex has long been depicted in movies and popular culture as having scaly skin. But the discovery of an earlier relative suggests the king of dinosaurs may have had a softer side.

The evidence comes from the unearthing of a new tyrannosaur species in northeastern China that lived 60 million years before T. rex. The fossil record preserved remains of fluffy down, making it the largest feathered dinosaur ever found.

If a T. rex relative had feathers, why not T. rex? Scientists said the evidence is trending in that direction.

"People need to start changing their image of T. rex," said Luis Chiappe, director of the Dinosaur Institute at the Natural History Museum of Los Angeles County, who was not part of the discovery team.

Much smaller dinosaurs with primitive feathers have been excavated in recent years, but this is the first direct sign of a huge, shaggy dinosaur. Scientists have long debated whether gigantic dinosaurs lost their feathers the bigger they got or were just not as extensively covered.

The new tyrannosaur species, Yutyrannus huali, is described in today's issue of the journal Nature. Its name is a blend of Latin and Mandarin, which translates to "beautiful feathered tyrant."

The creature lived about 125 million years ago. At 30 feet long and weighing a ton, Y. huali would have reached T. rex's chest.

Warm and fuzzy T. rex? New evidence surprises 04/04/12 [Last modified: Wednesday, April 4, 2012 9:51pm]
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