T-rex skin fossils suggest it was scaled, not feathered

Scientists examining the world's only known fossils of Tyrannosaurus rex skin – from the neck, pelvis, and tail, suggested that the dinosaur had a scaly reptile-like skin. Their finding was contrary to other researchers' claim of T-rex's being feathered. Researchers said that the dinosaurs' ancestors lost their feathers over time because they no longer needed them as insulation.