Some people say that living creature may have existed on Mars since there are many evidences for the presence of water on Mars surface. One of the noticeable thing on Mars is Olympus Mons, which is the tallest volcano on Mars, and maximum height above the surface of it is about 27 km and its area is immense enough to cover the whole part of Korean peninsula.
Mars is referred to the planet on which mankind possibly found a colony because of the fact that its atmosphere and environment are most similar to the Earth. If it is possible to terrafrom the Mars, humankind may leave the Earth for Mars in order to continue their lives and growth. I wish we can pull off turning mars into the place where we can live some day!