Members of the Mars Science Laboratory/Curiosity team, which include rover drivers and scientists, run a test between an engineering model of the current rover on Mars (front) and its successor, dubbed "Curiosity" (back), in the desert near Baker, California May 10, 2012. [Photo/Agencies]

Members of the Mars Science Laboratory/Curiosity team, which includes rover drivers and scientists, test out an engineering model of its next generation Mars rover, dubbed "Curiosity", in the desert near Baker, California May 10, 2012. [Photo/Agencies]