More than three million years after her death, the early human ancestor known as Lucy is still divulging her secrets. In 2016, an autopsy indicated that the female Australopithecus afarensis, whose ...

Others point out that her arms were longer than a modern human's, and the bones of her ... swing her arms as we do we running. Because her skeleton was so complete, Lucy gave us an unprecedented ...

In this video, learn about the human skeleton and how it lets us move ... and bones like the ones you find in the arms and legs help it move. But bones don’t move on their own.

“I was out in this landscape ... a little piece of arm bone, and that led to 40% of a skeleton 3,200,000 years old that opened up a whole new vista on our understanding of human evolution.” ...