Rivers On Titan

The Cassini spacecraft has discovered rivers on Saturn's moon of Titan. The temperature there is a bit cold for water to run, but liquid methane moves along the course. In fact:

"Titan is the only place we've found besides Earth that has a liquid in continuous movement on its surface," said Steve Wall, the radar deputy team lead, based at NASA's Jet Propulsion Laboratory, Pasadena, Calif. "This picture gives us a snapshot of a world in motion. Rain falls, and rivers move that rain to lakes and seas, where evaporation starts the cycle all over again. On Earth, the liquid is water; on Titan, it's methane; but on both it affects most everything that happens." 

What strange life dwells in those rivers of methane, beyond world of our own imaginings.

Read more at JPL.