A Soay sheep (IMAGE) Proceedings of the National Academy of Sciences Caption A Soay sheep on the island of Hirta, St Kilda archipelago, Scotland. Photo by Martin Stoffel. Credit Image credit: Martin Stoffel (University of Edinburgh, Edinburgh, United Kingdom). 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.