Mars

Mars is the fourth planet from the Sun. Named after the Roman god of war, it is often described as the "Red Planet" because the iron oxide prevalent on its surface gives it a reddish appearance. Mars has surface features reminiscent both of the impact craters of the Moon and the volcanoes, valleys, deserts, and polar ice caps of Earth. Geological evidence gathered by unmanned missions suggest that Mars once had large-scale water coverage on its surface.

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