The human brain, with its open-ended ... Some are anchored to bones within the hand, while others snake their way to the arm. The wrist is a floating cluster of bones and ligaments threaded ...

Our ancestors were making tools out of bones 1.5 million years ago, winding back the clock for this important moment in human evolution ... made out of the leg and arm bones of big mammals ...

But Lucy and other fossil finds reveal that more than 3 million years ago, a relatively small-brained, ape-faced human ancestor ... body as she moved. Lucy: arm bones With dangling, powerful ...