[NormsRevenge]

This enhanced-color view of Mars taken by NASA's Mars Reconnaissance Orbiter spacecraft on October 3, 2006 and released October 16, shows gullies in an unnamed crater in the Terra Sirenum region of Mars. his scene is about 254 meters (about 830 feet) wide. The upper and left regions of this scene are in shadow, yet color variations are still apparent. The high signal to noise ratio of the HiRISE camera allows for colors to be distinguished in shadows. (NASA/JPL/Univ. of Arizona/Handout/Reuters)

[NormsRevenge]

This image taken by NASA's Mars Reconnaissance Orbiter spacecraft October 1, 2006 and released October 16 shows the basal layers of Mars' north polar layered deposits. The floor of Chasma Boreale is at the bottom of the image. FOR EDITORIAL USE ONLY (NASA/JPL/MSSS/Handout/Reuters)