One of the six scientific instruments on board the European Space Agency's Huygens probe is a tiny microphone designed to help scientists listen for lightning strikes as the spacecraft descends through the atmosphere of Saturn's moon, Titan. Huygens is scheduled to arrive at Titan on January 14, 2005, after it's released by NASA's Cassini spacecraft. If Huygens actually passes through a storm, the microphone should actually be able to pick up the sound of liquid methane rain splashing against the spacecraft's casing. If the probe does find thunderstorms, this could indicate that they're part of the process that helps create the organic molecules detected in the moon's atmosphere.