Skulls (IMAGE) University of North Carolina Health Care Caption These skulls, from victims of the Khmer Rouge, are on display in a Buddhist stupa at Choeung Ek, a mass burial site commonly known as one of "the killing fields." Credit Photo by Katie O'Brien, UNC School of Medicine Usage Restrictions None 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.