Pretty cool. On the same subject, I saw that Werner Herzog movie last week “Cave of forgotten dreams” in 3D last week and it was pretty mind blowing. Cave drawings from people or a person who lived 32,000 years ago. Yes, that’s 32,000 years! Almost, but not quite as old as Helen Thomas. This cave had it’s entrance blocked by a cave in and it was perfectly preserved all that time, to the point where you can see the black ashes on the ground from the burnt stick the guy used to draw on the cave wall. What got me was how good the drawing were! They knew how the muscles laid on the animal, even the facial muscles.
http://www.imdb.com/title/tt1664894/
I saw Cave of Forgotten Dreams too. Amazing the use of perspective the early people had and the way they used the shape of the walls to layer images in 3d. Butterflies (or bats) painted onto stalactites to give the illusion of flight. Not primitive scribblings at all.