Quelccaya Ice Core (IMAGE) Ohio State University Caption This is a section of ice core that researchers at The Ohio State University extracted from the Quelccaya Ice Cap in Peru in 2003. Though the ice appears pristine, it contains evidence of human-produced air pollution from as early as the 16th century. Credit Photo by Paolo Gabrielli, courtesy of The Ohio State University. 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.