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dromaeosaur |
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| gonzalezorum probably couldn't have sustained powered flight, "it's not out of the realm [of possibility] that a common ancestor of Archaeopteryx and dromaeosaurs could have been a flyer," he notes. Since nonflying dromaeosaurs existed before birds, Norell considers this specimen the best evidence so far that animals developed feathers to keep warm before they ever used them to fly. |
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