This video says about itself:
9 jun. 2017
Since humans knew about dinosaurs, we have speculated that they were reptiles with scaly skin. Then in 2011, there were dinosaur fossils found in amber that had feathers on them. That started a debate on whether Jurassic Park and Jurassic World got it wrong for having dinosaurs in the movies without feathers. Now scientists want the world to know that the T. rex did not have feathers.
From Biology Letters:
Tyrannosauroid integument reveals conflicting patterns of gigantism and feather evolution
Published 7 June 2017
We describe fossil integument from Tyrannosaurus and other tyrannosaurids (Albertosaurus, Daspletosaurus, Gorgosaurus and Tarbosaurus), confirming that these large-bodied forms possessed scaly, reptilian-like skin.
Body size evolution in tyrannosauroids reveals two independent occurrences of gigantism; specifically, the large sizes in Yutyrannus and tyrannosaurids were independently derived. These new findings demonstrate that extensive feather coverings observed in some early tyrannosauroids were lost by the Albian, basal to Tyrannosauridae. This loss is unrelated to palaeoclimate but possibly tied to the evolution of gigantism, although other mechanisms exist.
According to Dutch paleontologist Anne Schulp, it is possible that tyrannosaurs had a few feathers as ornament at places where no scales were found.