In 2003, two robotic rovers landed on Mars and began sending back data about the possible existence of water on the red planet. Thos close examination of Mars was th result of new and improved technology. Because of advances in telecommunication systems, scientists on Earth can send commands faster snd receivedatain greater amounts. New software inthe rovers led to their increased abilityto make independent decisions and avoid dangers and hazards on their own. As result of new technologies for severe environments, the rovers and their computers were able to survive the extreme cold and hot conditions in space and on Mars. And due to their new improved wheels the twin rovers could move around the rocky Martian landscapewith ease.