The human desire to create art is ancient. Prehistoric cave paintings show the importance of visual imagery to our early ancestors. But a French professor believes such paintings may reveal an ancient love of music as well. And he recently put his theory to the test. Reporter Ari Daniel Shapiro has the story. Iegor Reznikoff is 70, but he speaks and moves quickly. His cane seems more like an afterthought than a necessity. He's a professor at the University of Paris Nanterre.