Strange wear marks on the teeth of Paleolithic people in Central Europe have long puzzled scientists, but new research may finally reveal the cause. Close up of Pavlovian teeth remains, and potential position of cheek piercings. © John C. Willman Numerous human remains discovered in central Europe dating to the last Ice Age have unusual abrasions on their teeth that have stumped experts for decades. Now, a researcher in Portugal has put forth an interesting explanation: cheek piercings. John C. Willman of the Laboratory of Prehistory (CIAS) at the University of Coimbra has suggested that Pavlovian people—a hunter-gatherer culture that...