What we find in the fossil record doesn't always represent what was going on. Prior to the pottery age, women in all societies are working in things that don't preserve very well, such as skins and braiding fiber.

In the graffiti, there is a lot of below-the-belt-art. The people in the art are predominantly women, and not a single one has any clothes on.

It fills the gap in the fossil record there in Ethiopia.

Lots of the wild animals in the caves have spears in them and blood coming out of their mouths and everything that a hunter would be familiar with. These were the Ferraris and football games of their time. They painted what was on their minds.

These were not the type of paintings that make it into the coffee-table art books.

It was like kids taking a pencil and drawing an outline around their hand.