Bared teeth are a prominent and eye-catching feature on many historical and archaeological artifacts, and are commonly interpreted as representing death, aggression and the shamanic trance. But a study in the forthcoming issue of Current Anthropology argues that the bared-teeth motif often expresses something a bit less sinister: the smile. Alice V. M. Samson, Faculty of Archaeology at Leiden University, the Netherlands, and Bridget M. Waller, Department of Psychology, University of Portsmouth, examined the bared-teeth motif (BTM) of the Taíno, who lived in the Greater Antilles (the Caribbean) from AD 1000 to the early decades of European contact (1492-1550). Here...