Some scientists suggest that Lucy's long arms may have helped her balance while bipedal -- much like the pole of a tightrope walker. With dangling arms and long, slightly curved hands and feet ...

It's Geoffrey Mark's opinion that the final moment, where a smiling Superman looks at Lucy, arms folded across his chest, one ...

and her high shoulders and the shape of her torso suggest it would have been difficult for her to swing her arms as we do we running. Because her skeleton was so complete, Lucy gave us an ...