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Riga 4:
:''The more that we learn about these animals the more we find that there is basically no difference between birds and their closely related dinosaur ancestors like velociraptor. Both have wishbones, brooded their nests, possess hollow bones, and were covered in feathers. If animals like velociraptor were alive today our first impression would be that they were just very unusual looking birds.''<ref name=sciencedaily2007feathers>{{en}} Da ''[http://www.sciencedaily.com/releases/2007/09/070920145402.htm Velociraptor had feathers]'', ''ScienceDaily'', 20 settembre 2007.</ref>
*Possiamo inferire che ''[[Tirannosauro|T. rex]]'' fosse piumato, almeno durante una fase della sua vita, nello stesso modo in cui inferiamo che gli australopitecini come Lucy avessero i peli.
:''We have as much evidence that'' T. rex ''was feathered, at least during some stage of its life, as we do that australopithecines like Lucy had hair.''<ref name=wired2012>{{en}} Da
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