Ancient lake levels (IMAGE) Columbia Climate School Caption Dotted lines represent past highstands of Lake Dali. Credit Photo: Yonaton Goldsmith Usage Restrictions For reuse with attribution: Y. Goldsmith/Lamont-Doherty Earth Observatory 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.