Mars is the only terrestrial planet to host multiple moons.
Mars is a small rocky body once thought to be very Earthlike. Like the other terrestrial planets Mercury, Venus, and Earth its surface has been changed by volcanism, impacts from other bodies, movements of its crust, and atmospheric effects such as dust storms. It has polar ice caps that grow and recede with the change of seasons; areas of layered soils near the Martian poles suggest that the planet's climate has changed more than once, perhaps caused by a regular change in the planet's orbit.