Nearly 20 years ago, the Cassini probe and its Huygens lander peeked under the hazy atmosphere of Saturn's largest moon Titan and gave us our first glimpse of the moon's familiarly strange surface.
Cassini-Huygens found that noxious liquids like methane and ethane form a very Earthlike patchwork of streams, rivers, and even seas as large as the Great Lakes.
