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The uncertainty of science: The only known fossils of a T Rex’s skin suggest that the dinosaur was covered with scales, not feathers as recent research has theorized.
[I]f these large tyrannosaurs had any feathers at all, says the team, their fluff would have been limited to their backs—the only body part for which they were lacking fossil impressions. Because their earlier cousins did have feathers, it’s likely that the large tyrannosaurs lost them somewhere along the way, the team suggests.