Scientists have known for a while that Saturn's largest moon, Titan, has rivers and seas of liquid methane on its surface.

This composite image shows an infrared view of Titan from NASA's Cassini spacecraft, acquired during a high-altitude fly-by, 6,200 miles above the moon, on Nov. 13, 2015.

Like many of the larger bodies in our solar system, Saturn’s massive moon Titan has long been of interest to astronomers due to its unique surface features. NASA’s Cassini spacecraft ...

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This artist's concept of a lake at the north pole of Saturn's moon Titan illustrates raised rims and rampart-like features as seen by NASA's Cassini spacecraft. | Credit: NASA/JPL-Caltech With ...

This artist's concept of a lake at the north pole of Saturn's moon Titan illustrates raised rims and rampart-like features as seen by NASA's Cassini spacecraft ...

Scientists have long known that Saturn's largest moon, Titan, hosts rivers and seas of liquid methane. But it's strangely lacking in river deltas, a new study suggests.

Saturn's largest moon, Titan, is the only body beyond Earth known to host stable bodies of liquid on its surface. | Credit: NASA/JPL/University of Arizona/University of Idaho Scientists have known ...