Drilling work in permafrost (IMAGE) University of Cologne Caption A piece of the drilled permafrost core extracted during drilling operations on the New Siberian Islands in the North of eastern Siberia. Credit Lutz Schirrmeister, Alfred Wegener Institute Usage Restrictions none 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.