Evolution has equipped animals with arms and legs of all shapes and sizes — but is one type of limb more important than the other? The answer lies in a different question: What species are you talking about?
"Animals live in different environments. They do different things ecologically," John Hutchinson, a professor of evolutionary biomechanics at the Royal Veterinary College in London, told Live Science. "What we can do is look at the patterns we see in nature through time and see how legs and arms have evolved, and that will give us some clue as to the importance of legs and arms."
