Scientists have known for a while that Saturn's largest moon, Titan, has rivers and seas of liquid methane on its surface. But it's strangely lacking in deltas, a new study suggests. On Earth, large ...

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.

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 ...

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 ...

"Titan is weird. It's a playground for studying processes we thought we understood." Scientists have known for a while that Saturn's largest moon, Titan, has rivers and seas of liquid methane on ...

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 ...