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Researchers at the China University of Geosciences discovered a semitranslucent mid-Cretaceous amber sample containing appendage covered in delicate feathers, thought to belong to a dinosaur that roamed the Earth more than 99 million years ago. The lead paleontologist Lida Xing commented that "this is the most impressive finding of my career to date". The study was funded in part by National Geographic and the Chinese University. The 1.4 inch amber sample was later analysed to gather more data using CT scans and Microscopic analysis which led to the revelation that the appendage consisted of eight vertebrae from the middle or end of a long, thin tail that may have been originally made up of more than 25 vertebrae (see below). Based on these findings the researchers believe that the tail belongs to a juvenile coelurosaur, part of a group of theropod dinosaurs that includes everything from tyrannosaurs to modern birds.
Recently in the news there has been a lot of discussion about a feathered non-avialan theropod /coelurosaur tail that was found intact, kept preserved for 99 million years in amber. Here is the study published about it: http://www.cell.com/current-biology/pdf/S0960-9822(16)31193-9.pdf and a Nat Geo article http://news.nationalgeographic.com/2016/12/feathered-dinosaur-tail-amber-theropod-myanmar-burma-cretaceous/ On an awesome-ness scale of 1 to Sue, where do you place a fossil find like this? (Feel free to insert your own subjective fossil scale criteria, as well as swapping Sue for another fossil that reperesents a perfect 10 to you) -Curious Fossil noob