Dark Slopes of the Ice Cap (image) University of Copenhagen Caption This is an image of one of the dark slopes in the middle of the ice cap on Mars's north pole. The layers can have varying level of dust. Credit NASA/JPL/UA Usage Restrictions Credit required 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.