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. Last Updated: 07/27/2016

Cold-Blooded Noses

WASHINGTON () -- Scientists have never been sure whether dinosaurs were warm-blooded, like humans and other mammals, cold-blooded like reptiles or some variation in between. A study of dinosaur nostrils has breathed new life into the debate.

CAT scans of "superbly preserved specimens" of both flesh-eating and plant-eating dinosaurs from the Cretaceous period show they had a nasal anatomy similar to that of modern cold-blooded animals such as crocodiles and lizards, according to a report in the Aug. 30 issue of Science.