Smiles (IMAGE) University of Chicago Press Journals Caption These are bared-teeth displays in human, rhesus macaque and Taíno material culture (shell face) from El Cabo, Dominican Republic. Credit Alice V. M. Samson and Bridget M. Waller (human), Lisa Parr (rhesus macaque) and project Houses for the Living and the Dead (shell face). Figure courtesy of Current Anthropology. Usage Restrictions Please credit as above. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.