All Dinosaurs May Have Had Feathers

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Early dinosaurs probably looked a lot more like Big Bird than scientists once suspected. A newly discovered, nearly complete fossilized skeleton hints that all dinosaurs may have sported feathers. “It suggests that the ancestor of all dinosaurs might have been a feathered animal,” says study author Mark Norell, a paleontologist at the American Museum of […]

Do Your Bones Show Your Life History

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Life stories written in mammal bones are being used to debunk a key argument for cold-bloodedness in dinosaurs. Annual growth lines etched in the femurs of 115 wild warm-blooded mammals such as giraffes, reindeer and gazelles are similar to those previously seen in the bones of reptiles and dinosaurs, researchers report online June 27 in Nature. […]