Early European explorers in the Caribbean islands commented on the "abominable" and "frightening" figures in the locals' art, with their bared teeth and "burning" eyes. But a new analysis suggests that the artists may have intended these expressions as inviting smiles rather than demonic grimaces.

According to Dr. Bridget Waller, who co-published the research results in Current Anthropology, "Exposed and clenched teeth are not common features of aggression.... Regardless of the specific context, baring teeth is most probably about social bonding."