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.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/_...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/_...