Image credit: NASA/JPL-Caltech/University of Arizona This image was posted in connection with a Phoenix Mars Lander news briefing on June 20, 2008. While digging trenches the Phoenix Lander uncovered ICE, the white substance in the photo, which is believed to be part of the Martian Polar Ice cap. Water on Mars! Proof at last! Use the link below to visit the Phoenix Lander Home Page for details! The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.