Maasai (IMAGE) University of Pennsylvania Caption This is a Maasai woman in a traditional outfit posing with her livestock. Credit Alessia Ranciaro/Tishkoff Lab Usage Restrictions In context of reporting 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.