With a single depression fracture at the back of the head, we believed that the only animal capable of inflicting a wound like this was a raptor but we could not prove it beyond a reasonable doubt.

Everyone has the same right not to be sexually harassed. The issue is what remedies the legislature lays out. For employees, you have these remedies, and for non-employees, you have these other remedies.

These types of discoveries give us real insight into the past lives of these human ancestors, the world they lived in and the things they feared.

It shows that it was not only big cats our ancestors had to be afraid of. It was also these creatures from the air -- aerial bombardment if you will, that were stressors to our ancestors that grew and shaped and formed our behavior today.

These birds would have been after the most vulnerable members of the group.

These critical clues were puncture marks in the base of the eye sockets of primates, made when the eagles ripped the eyes out of the dead monkeys with their sharp talons and beaks. It was a marker that others hadn't noted before, that linked eagles definitively to the kill.

I almost dropped down when I looked into the eyes of the skull as I saw the marks... they were perfect examples of eagle damage. Thousands of scientists, including myself, had overlooked this critical damage.

Most of my colleagues felt we had reached the end of the road in solving this problem. It was the ultimate two-million-year-old cold case!

It was the ultimate 2 million-year-old cold case.

It just shows that you can never stop looking. Just because something has been studied for years doesn't mean that it can't still tell us new things.