Earth or Mars . ... Credit Copyright: Mars Exploration Rover Mission , JPL , NASA Explanation: Which image is Earth, and which is Mars? One of the above image s was taken by the robot Spirit rover currently climbing Husband Hill on Mars . The other image was taken by a human across the desert south of Morocco on Earth . ... Each planet has a surface so complex that any one image does not do that planet justice . ... Does the one on the left look like home? Possibly not, but it is Earth . ...