"Mars, the place where new branches of civilization can develop. T hat is the place where the science is, where the challenge is and where the future is." Dr. Robert Zubrin, american aerospace ingineer, founder and president of Mars Society and President of Pioneer Astronautics SCIENCE Mars was once warm and wet planet, it had liquid water on its surface for more than bilion years, which is about five times as long as it took life to appear on eart after there was liquid water here. So if the theory is correct that life is a natural development from chemistry, or if you have liquid water, various elements and sufficient time, life should have appeared on Mars even if subsequently went extinct and if we can go to Mars and find fossils of past life, we will have proven the development of life is a general phenomenon in the universe. Or, alternatively, if we go to Mars and find plenty of evidence of past bodies of water but noevidence of fossils or development of live,