A Mother Rhesus Macaque and Infant at the California National Primate Research Center (image) University of California - Davis Share Print E-Mail Caption Studies on rhesus macaques at the California National Primate Research Center contributed to a new technique allowing researchers to pinpoint the end of exclusive breast-feeding in Neanderthals. Credit Kathy West, CNPRC Usage Restrictions May be used with credit. Share Print E-Mail 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.