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News From the Field

The mystery of lizard breath


December 11, 2013

CT scan showing airways in the lung of a lizard Air flows mostly in a one-way loop through the lungs of monitor lizards--a breathing method shared by birds, alligators and, presumably, dinosaurs, according to a new University of Utah study. The findings--published online Wednesday, Dec. 11, in the journal Nature--raise the possibility this breathing pattern originated 270 million years ago, about 20 million years earlier than previously believed and 100 million years before the first birds. Why remains a mystery. Full Story

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University of Utah

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