Follow their extraordinary journey from shore to sea. Although whales are expert swimmers and perfectly adapted to life underwater, these marine mammals once walked on four legs. Their land-dwelling ...

Almost all other mammals stand and walk or run on four limbs. Those that stand on two ... is knuckle-walking -- standing on their hind legs but stooping forward, resting their hands on the ...

Dray had to have both legs, as well as her right forearm and her left hand amputated in August 2011 A woman in France is speaking out almost 14 years after having to have all four of her limbs ...