On Saturn's hazy moon Titan, torrential downpours of methane punctuate centuries of drought on a landscape of sand dunes and badlands.
That quote is from a great article on Titan in the current issue of Physics Today, and I noticed that the full article is available online. "The changing face of Titan" by Ralph D. Lorenz of Johns Hopkins University integrates and summarizes a lot of what has been learned about this strange, cold, but dynamic world from the Huygens probe and especially from the many fly-by passes of the Saturn-orbiting Cassini spacecraft. With the Cassini mission extended for two more years, scientists will have 26 more Titan passes to learn even more.
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