Burroughs Crater Ice (IMAGE) American Geophysical Union Caption Layered ice in Burroughs crater on Mars, with imagery from THEMIS (left) and HiRISE (right panels). The ice layers here record climate oscillations now linked precisely to changes in Mars’ orbit and tilt, according to a new study in the AGU journal Geophysical Research Letters. Credit Sori et al./Geophysical Research Letters 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.