Tomb of the Eagles (IMAGE) University of York Caption The stone building is Isbister in Orkney, also known as Tomb of the Eagles where some of the seaweed samples analysed in the study came from. Credit Professor Karen Hardy Usage Restrictions For use with press release License Original 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.