NASA's Phoenix Mission to Mars

In this image taken by NASA's Phoenix Mars Lander's Robotic Arm Camera (RAC) shows a trench, informally called "Dodo" after the second dig, located within the previously determined digging area, informally called "Knave of Hearts" on June 3, 2008. The light square to the right of the trench is the Robotic Arm's Thermal and Electrical Conductivity Probe (TECP). The Robotic Arm has scraped to a bright surface which indicated the Arm has reached a solid structure underneath the surface. (UPI Photo/ NASA/JPL/Caltech/University of Arizona/Max Planck Institute)