http://news.nationalgeographic.com/2016 ... iornithes/
A study of the mummified wings, published in the June 28 issue of Nature Communications and funded in part by the National Geographic Society's Expeditions Council, indicated they most likely belonged to enantiornithes , a group of avian dinosaurs that became extinct at the end of the Cretaceous period.
Mummified, 99-Million-Year-Old Wings Caught in Amber
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