Lake Depth Changes on Titan (image) California Institute of Technology Caption Ephemeral lake observations in Titan's south polar region near (60S,150E). The blinking image shows partially filled lakes (outlined in cyan) disappearing between images obtained in December 2007 (Cassini pass T39) and May 2009 (T55). Models of the change in radar brightness suggest that the amount of liquid loss is ~1 m/yr, consistent with the analysis of shoreline recession at Ontario Lacus. Credit Cassini Radar Science Team, NASA/JPL/Caltech. Usage Restrictions None 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.