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Giant feathered carnivorous dinosaur found in China. SO FLUFFY!

While not all dinosaurs had feathers, most of the ones that were feathered that have been discovered so far were small dinosaurs, not much bigger than a turkey. And then scientists discovered the remains of Yutyrannus huali, a relative of the fearsome T-rex in China, who is the largest feathered dino found to date. A large, feathered T-rex essentially.

At 30 feet long and weighing 3,000 pounds, Y. huali wasn’t so large as T. rex, which came 60 million years later, but it’s the largest feathered tyrannosaur yet found. That such a big creature was feathered suggests its iconic descendant could have been similarly plumed.

The discovery provides “direct evidence for the presence of extensively feathered gigantic dinosaurs,” wrote paleontologists led by Xing Xu of the Chinese Academy of Sciences in their description of the new dinosaur, published April 5 in Nature.

With a Latin and Mandarin name translating to “beautiful feathered tyrant,” Yutyrannus huali was found in the Yixian Formation, a fossil deposit in northeastern China that over the last two decades has yielded dozens of dinosaur skeletons so finely preserved that it’s possible to discern feather-like structures. Those discoveries have fundamentally changed how dinosaurs appear in our imagination’s eye. Contrary to traditional artistic interpretation, many — perhaps most — of the great reptiles were not covered in scales, but rather with feathers.

Whether T. rex was similarly quilled has remained a matter of speculation. While early feathered members of the tyrannosaur family have been found, they were very small. If the primary purpose of feathers was insulation, a possibility suggested by the feathers’ down-like shape, then larger tyrannosaurs might not have needed them. Thanks to small surface-to-volume body ratios, large-bodied animals tend to maintain heat easily.

The significance of Y. huali is its body size and the apparent density of feather-like structures, said paleontologist Julia Clarke of the University of Texas at Austin. “We didn’t know whether these larger-bodied forms would show as many.”

As for the possibility of a plumed T. rex, “We have as much evidence that T. rex was feathered, at least during some stage of its life, as we do that australopithecines like Lucy had hair,” said Mark Norell of the American Museum of Natural History.


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