Baboon females, Amboseli basin, Kenya (IMAGE) Duke University Caption Born to rule and rarely challenged, alpha female baboons have lower levels of stress hormones than their dominant male counterparts or other females. Credit Photo by Matthew Zipple, Duke University. Usage Restrictions Please credit Matthew Zipple, Duke University. 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.