To live on Mars. In about ten years men will begin to visit the planets nearest to Earth. Two space ships will carry twelve people to Mars. They must travel for three months. One ship will fly to the ground on Mars, to stay one month. Scientists hope to find useful things on Mars. Perhaps they can get minerals which we do not have on Earth. The scientist will study Mars plants and animals, if they find some. But, most important, scientists want to learn how men can live on Mars. If they find enough air and water and they can grow or make enough food, then people can move to Mars to work and build new homes, about twenty years from now.