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Dinos straddled line between cold- and warm-blooded

Ancient creatures’ metabolisms were more like those of tuna, not birds or reptiles

MIDDLE OF THE PACK  Dinosaurs’ metabolisms fit somewhere in between cold-blooded reptiles and warm-blooded mammals and birds, a new analysis of growth rate and energy-use data suggests.

J. Grady

By Meghan Rosen

- More than 2 years ago

Dinosaurs weren’t quite like cold-blooded reptiles, but they weren’t like warm-blooded birds either.