Top left: Courtesy USGS Astrogeology Research Program, http: / / astrogeology.usgs.gov; Mars map: National Geographic Society, MOLA Science Team, MSS, JPL, NASA; Mars surface: NASA / JPL / Caltech
Top right: Courtesy USGS Astrogeology Research Program ,‎ http: / / astrogeology.‎usgs.‎gov; Mars map: National Geographic Society ,‎ MOLA Science Team ,‎ MSS ,‎ JPL ,‎ NASA; Mars surface: NASA / JPL / Caltech