last night, at my mother's urging (and we know moms are always right), i went to a lecture by dr. jean clottes, a charming, erudite frenchman who's an expert in rock art. no, not art for rock n' roll, but prehistoric drawings found in the caves at chauvet. they are the earliest known cave paintings and date back an estimated 32,000 years ago. looking at the slides during the lecture, i couldn't help thinking of marc chagall's drawings. they are so similar (and sophisticated), yet chagall couldn't have seen the chauvet drawings, because they weren't discovered until 1994. wow!