when researching dinosaurs, it is important to take asian sources with a bucket of salt. china has a thriving fake fossil market and routinely lies about finds, especially in regards to feathered dinosaurs. this also applies to most mongolian finds since chinese paleontologists tend to be the ones operating there.  feathered dinosaurs did exist in some capacity, but the fact that the overwhelming majority of supposed examples come from china and mongolia should raise some eyebrows. perhaps the most damning example is with yutyrannus, a chinese tyrannosaurid that lived about 50 million years before t. rex. yutyrannus is the largest known feathered dinosaur and is supposed to have been covered in feathers. here we run into 2 major problems though.  firstly, yutyrannus is several times the size of every other feathered dinosaur we know of today, including all of the chinese ones. it almost seems to come out of nowhere. where are all the midsized feathered dinosaurs? it is rather unlikely that all but 1 of the feathered dinosaurs we know of today are smaller than a sheep. the other problem is even more interesting. tyrannosaurs are thought to have evolved in asia, with yutyrannus being one of the earliest members of the group. how is it that feathers evolved so early in tyrannosaur history and then disappeared later? we have skin impressions from the similarly sized american gorgosaurus, the larger asian tarbosaurus, and t. rex. none of these impressions show any evidence of feathers despite coming from various parts of their body. why did they suddenly evolve and then suddenly disappear like that? the obvious answer is that the chinese are lying to make themselves look better. > inb4 dinosaurs are fake anyways wrong. paleontology is an aryan science. how would it help the jews to lie about their existence. > inb4 you just want feathered dinosaurs to be fake no, i actually wanted them to be real. i think they look cool and i was rather disappointed when i figured it out.
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