some of geographic
do you know long ago meteorite (a rock from outer space) landed on earth near the south pole. scientists think that the rock came from mars. some scientists have found what they think might be sings of life, including fossils on the rock. other scientists think these signs of life did not come from mars. some think they may have come from earth.
A Martian day is about as long as an earth day, but its year lasts 687 days. mars has a thin atmosphere of carbon dioxide the gas you breathe out. like earth, mars has a metallic core and a rocky outer crust. it also has ice caps at each pole. some of the ice is water, and some is frozen carbon dioxide.
mars has two small, potato-shaped moons, which are probably asteroids trapped by Martian gravity