In 1976 the space probe Viking transmitted pictures of the surface of Mars to Earth. One of the pictures showed the outline of a human face in the middle of an area called Cydonia. The believes of many in the existence of life on mars were supported by that transmission but most people were just amused. Till now there is no proof of life on the red planet. On Mars, there is great excitement because for the 500th time NASA is sending a probe to explore the red planet, and its green residents are looking forward to be finally discovered. In previous years there were repeated breakdowns and never a success, but this time there is a plan that must not fail.