While the Huygens probe's mission may be over, Cassini continues to examine that enigmatic Saturn moon, Titan:
During its closest flyby of Saturn's moon Titan on April 16, the Cassini spacecraft came within 1,027 kilometers (638 miles) of the moon's surface and found that the outer layer of the thick, hazy atmosphere is brimming with complex hydrocarbons.
Scientists believe that Titan's atmosphere may be a laboratory for studying the organic chemistry that preceded life and provided the building blocks for life on Earth. The role of the upper atmosphere in this organic "factory" of hydrocarbons is very intriguing to scientists, especially given the large number of different hydrocarbons detected by Cassini during the flyby.
While Mars's atmosphere is thin enough that flying probes can be problematic, I wonder if Titan's is thick enough? After all, the chances for a liquid surface on Titan are much greater, and I'd hate for the next mission to that moon to end with a sad "splork!"