[Coyoteman]

Art hit the ground running. There appear to be no amateur, tenative, halting steps ~ there was no art, and then there was.

This is a result of some sort of genetic change that occurred in Europe first.

Can you think of no other possibilities? None at all?

(I can.)

[muawiyah]

Sure, we simply haven't found earlier evidence.

Or, alternatively, guys from outerspace did the drawings, or..... there are many, many possibilities. At the moment, though, we have only this cave.