California middle school students using the camera on NASA's Mars Odyssey orbiter recently discovered a cave on Mars. The discovery by the seventh-grade class at Evergreen Middle School in Cottonwood, Calif., was made possible by NASA's Mars Student Imaging Program -- a program that invites classrooms nationwide to conduct planetary exploration and science using NASA instruments. The program is run by Arizona State University, Tempe, and NASA's Jet Propulsion Laboratory, Pasadena, Calif.
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