The surface of Mars. In the foreground are a gnu and a giant pump-magazine killer robot whose head is being piloted by Tux the penguin. At their feet lies a dead robot, its head smashed in. Image: Muhammad Mahdi Karim (modified) https://commons.wikimedia.org/wiki/File:Blue_Wildebeest,_Ngorongoro.jpg GNU FDL https://www.gnu.org/licenses/fdl-1.3.html