The puzzling, apparently wasteful habit of some animals to exert force in the direction opposite of where they want to go actually has an important purpose: to increase both stability and maneuverability.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/5...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/5...