Ring-Tailed Lemur Mother and Babies (IMAGE) Duke University Caption A mother lemur's pregnancy hormones affect her daughter's aggression later in life, researchers report. Credit Photo by David Haring, Duke Lemur Center Usage Restrictions Please credit David Haring, Duke Lemur Center 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.