
Saturn's largest moon is covered in seas and lakes of liquid hydrocarbons and one sea has now been found to be filled with pure methane, with a seabed covered by a sludge of organic-rich material, and possibly surrounded by wetlands.
Saturn's largest moon is covered in seas and lakes of liquid hydrocarbons and one sea has now been found to be filled with pure methane, with a seabed covered by a sludge of organic-rich material, and possibly surrounded by wetlands.