“By measuring reflected sunlight from Titan’s surface and atmosphere, the international Cassini spacecraft detected a dark region near the landing site of Huygens, a companion probe that parachuted to Titan’s equator in 2005.
Scientists said further analysis of the dark feature suggests the presence of a 927-square-mile hydrocarbon lake – twice as big as Lake Champlain, a freshwater lake that borders upstate New York and Vermont. Near the tropical lake were hints of four shallow ponds similar in size and depth to marshes on Earth.”