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Dinosaur debate gets cooking

Researchers deflate evidence for cold-blooded dinosaurs

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 dinosaurs and other reptiles, researchers report online June 27 in Nature.

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