[ScienceD] Five-legged kangaroo? Telling the tale of a kangaroo's tail

[Science Daily]

Five-legged kangaroo? Telling the tale of a kangaroo's tail

Kangaroos may be nature's best hoppers. But when they are grazing on all fours, which is most of the time, their tail becomes a powerful fifth leg, says a new study. It turns out that kangaroo tails provide as much propulsive force as their front and hind legs combined as they eat their way across the landscape.

http://feeds.sciencedaily.com/~r/science...193308.htm