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 study that may push the evolution of this trait back to 270 million years ago.
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 study that may push the evolution of this trait back to 270 million years ago.