Audio Podcast: GRAIL Spacecraft-New Year's Moon Arrival NASA's twin GRAIL spacecraft are on course to enter orbit around the moon just in time for 2012. › listen now Podcast: The American Rocketeer 75 years ago, the first rocket tests were conducted on a site that is now NASA's Jet Propulsion Laboratory. › listen now Podcast: NASA's Aquarius Mission to Fly High Over the Salty Seas NASA prepares for launch of Aquarius, an Earth-orbiting mission that will measure salt content on the ocean surface. › listen now A Valentine's Date With a Comet NASA's Stardust-NExT mission has a Valentine's Day date to meet up with comet Tempel 1. › listen now Students Find Cave on Mars Audio Clips Using the camera on NASA's Mars Odyssey orbiter, seventh graders at Evergreen Middle School in Cottonwood, Calif., found an apparent cave on Mars. › listen now Podcast: Mars Rovers 'Talk' Via Audio Files NASA's long-lived Mars rovers share tales of their journeys via data turned into audio files. › listen now Podcast: A WISE Mission to Study Asteroids and Other Objects NASA's Wide-field Infrared Survey Explorer, or WISE, is scheduled for launch in December 2009, on a mission to survey the entire sky in four infrared wavelengths. › listen now New Impact Craters on Mars NASA's Mars Reconnaissance Orbiter has revealed frozen water hiding just below the surface of mid-latitude Mars. › listen now Podcast: Kepler: Are There Other Earths Out There? NASA's Kepler mission is starting its hunt for other "Earths" in our galaxy. › listen now Podcast: The Space Hunt Is On -- for Carbon Dioxide NASA's new Orbiting Carbon Observatory will study carbon dioxide--a major contributor to global warming--in Earth's atmosphere. › listen now