Scientists study mysterious 'lakes' of Saturn's moon

Saturn's moon Titan has a wealth of lakes and seas on its surface, making it the only known celestial body in the solar system other than Earth to have exposed liquid masses.

Though scientists have long theorized that the vast pools are filled with hydrocarbon rains and underground liquids, they only recently determined how the depressions themselves likely occurred.

The process similar to how sinkholes develop here.

NASA explained, "These are terrestrial landscapes that result from erosion of dissolvable rocks, such as limestone and gypsum, in groundwater and rainfall percolating through rocks."

The team also determined that the depressions existing in Titan's polar regions formed within a span of 50 million or so years.

Though in space terms that's an impressively rapid pace, it's still significantly more time than it takes for such terrestrial features to develop on Earth.

Said one of the researchers, "We found that the dissolution process occurs on Titan some 30 times slower than on Earth due to the longer length of Titan's year and the fact it only rains during Titan summer."

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