Mars
Mars is the fourth planet from the 
Sun. The surface of Mars is orange-red because it is covered in iron(III) oxide dust, giving him the nickname "the Red Planet". A Martian solar year is equal to 1.88 Earth years (687 Earth days). Mars has two natural satellites that are small and irregular in shape.
Mars is arrogant and aggressive because he is the god of war. Many people also speculate that 
aliens live, or at least, lived, on Mars.
History
Scientists have theorized that during the Solar System's formation, Mars was created as the result of a random process of run-away accretion of material from the protoplanetary disk that orbited the Sun. Mars has many distinctive chemical features caused by his position in the Solar System. Elements with comparatively low boiling points, such as chlorine, phosphorus, and sulfur, are much more common on Mars than on 
Earth; these elements were probably pushed outward by the young Sun's energetic solar wind.
