Posted on Tue, Dec. 09, 2003 French student looks for lefties among earliest cave painters By ALEXANDRA WITZE The Dallas Morning News Prehistoric shamans used to mark the transition from the real world to the spirit world, anthropologists think, by blowing pigments around their hands onto cave walls. These ghostly hand prints, which still dot European caves more than 10,000 years later, now serve a less ethereal purpose — telling scientists how many of those shamans were left-handed. New research shows that the frequency of left-handed painters — 23 percent — is the same today as it was back then....