The Mars Reconnaissance Orbiter has been diligently mapping the martian terrain for many years. Here the HiRISE instrument on the MRO photographed the Eridania Basin, located at the head of Ma’adim Vallis, may have been the site of an ancient inland sea on Mars with some interesting geological and mineral evidence supporting this thesis. Further assumptions may be made regarding the weather on ancient Mars and whether the conditions were right for life to have existed on the red planet.