The Cassini mission to Saturn has mapped a region of the moon Titan and found the best evidence yet for icy water volcanoes in the solar system. Night-time city lights may indirectly raise daytime smog. The first X-ray movie of a lightning. And dozens of potential new species seen in the Sulawesi Sea, off Borneo. These are the stories I filed this week from the 2010 Fall Meeting of the American Geophysical Union in San Francisco.
Also from the meeting, Harvey Leifert has an update on Voyager 1, which is now 115 times more distant from Earth than Earth is from the Sun.