17 noviembre 2014
Biologists long assumed that one-way air flow was a special adaptation in birds driven by the intense energy demands of flight. But now scientists have shown that bird-like breathing also developed in green iguanas – reptiles not known for high-capacity aerobic fitness. The finding bolsters the case that unidirectional bird-like flow evolved long before the first birds.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/6FTTQTQ78vE/141117154614.htm
