Eroding Edge (IMAGE) Proceedings of the National Academy of Sciences Caption Eroding edge of permafrost peat plateau, Seida, Western Russian Arctic. Credit Image credit: Gustaf Hugelius. 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.