Sampling Skin Pigmentation in Africa (IMAGE) University of Pennsylvania Caption In a first-of-its-kind study, University of Pennsylvania researchers studied the genetics behind skin pigmentation of diverse African populations, finding new genetic variants associated with skin color. Here, senior research scientist Alessia Ranciaro measures the skin reflectance of a man from a Nilo-Saharan group. Members of this population tend to have very dark skin pigmentation. Credit Courtesy of the 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.