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Mars is the fourth planet from the Sun. Its iron-rich soil made it look red in colour. It is similar to earth in many ways. It has landforms like canyons and mountains. Mars houses one of the most tallest mountains in the solar system, Olympus Mons. In 1965, Mariner 4 dicovered liquid water on Mars. Mars has 2 moons Phobos and Deimos. They are thought to be captured asteroids from the Asteroid Belt.
In my opinion, Mars is the second most suitable planet to sustain life as the temperaturre is just right. I believe that some anaerobic microorganisms may live on Mars. Humans can also live there if it has enough oxygen.