Can you tell how many legs does a kangaroo have? According to an interesting study by Biology letters and published by Royal Society Publishing, Kangaroos Use Tail as Fifth Leg.
Kangaroos are well known for hopping on their muscular hind legs with their long tail outstretched behind.
The study found that the tail of a walking kangaroo works as hard as the leg of a comparably sized human strolling at the same speed. No other animal is known to employ its tail this way.
