Recurrent Slope Linae (IMAGE) University of Southern California Caption Recurrent Slope Linae on the Palikir Crater walls on Mars. Credit NASA/JPL/University of Arizona 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.