At least one entire class of dinosaurs seems to have had feathers — including velociraptors, and probably T. rex. Find out how we know, and how we even know what color some of them were!

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Sources:
http://www.nature.com/nature/journal/v484/n7392/abs/nature10906.html
http://www.nature.com/news/palaeontology-the-truth-about-t-rex-1.13988
http://phenomena.nationalgeographic.com/2013/01/28/p-is-for-pelecanimimus/
http://phenomena.nationalgeographic.com/2012/12/31/hooray-for-dinofuzz/
http://www.smithsonianmag.com/science-nature/dinosaurs-living-descendants-69657706/?all
http://www.smithsonianmag.com/science-nature/colorful-plumage-began-with-feathered-dinosaurs-180949691/
http://news.nationalgeographic.com/news/2010/01/100127-dinosaur-feathers-colors-nature/
http://www.nature.com/news/rival-species-recast-significance-of-first-bird-1.16469
http://www.nature.com/ncomms/journal/v3/n1/abs/ncomms1642.html
http://www.livescience.com/24745-archaeopteryx.html
http://www.scientificamerican.com/article/new-fossil-reveals-velociraptor-sported-feathers/
http://www.dinosaur-world.com/feathered_dinosaurs/sinosauropteryx_prima.htm
http://www.amnh.org/exhibitions/past-exhibitions/dinosaurs-ancient-fossils-new-discoveries/liaoning-diorama/a-feathered-tyrant
http://news.nationalgeographic.com/news/2013/06/130614-dinosaur-xray-bird-color-feather-archaeopteryx/
http://www.dinodictionary.com/index.asp

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Did Dinosaurs Really Have Feathers?

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