http://www.jpl.nasa.gov/news/news.cfm?release=2008-152 –

Scientists have been using a robotic spacecraft to explore what looked to be large lakes on the surface of Saturn’s moon, Titan. They couldn’t be entirely sure that the features were actually liquid lakes, and not simply very smooth, solid material.

New findings seem to confirm that the observations really do show extensive seas of liquid ethane and other hydrocarbons. In fact, Titan seems to have an entire ‘water’ cycle of ethane evaporation, rain and rivers.