birds

evolution birds walk science weird - 7401214720
Via: National Geographic
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The crouched stance developed to compensate for the growth of larger forelimbs that eventually made flight possible, according to new research that digitally "fleshed out" fossils to show physical changes over the eons as bipedal dinosaurs evolved into birds.
brains birds science dinosaurs - 7707021056
By Unknown
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New research led by the American Museum of Natural History provides evidence that dinosaurs evolved the brainpower necessary for flight well before they actually took to the air as birds.