Saturn’s moon Titan is so large it outsizes the planet Mercury, making it the second-biggest moon in the solar system after Jupiter’s Ganymede Space DailyTitan has rivers, rainfall, lakes and a slow hydrological cycle exactly like Earth’s, except that every drop of it is liquid methane and the rock the rivers run over is water ice spacewar.comThere is a moon of Saturn where the rain is essentially liquid natural gas, the mountains are made of water frozen so hard it behaves like rock, and the lakes at the north pole contain more combustible fuel than every proven oil and gas reserve on Earth combin ScienceBlog.comSaturn’s moon Titan has rivers, lakes and rainfall without a single drop of water, and scientists know why The Times of IndiaOn Saturn’s moon Titan, molecules that chemistry says should never mix are mixing — NASA and Chalmers University researchers found that at minus 183 degrees Celsius, substances as incompatible as water and oil can dissolve into each other Space Daily