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km is standard international measure, mars is not in USA. If you wish to change for clarity, convert km to miles properly. They are not equivalent.
Mars has two moons: Phobos and Deimos. Russian scientists in the 1950s posited that Phobos might be hollow, but these claims were discredited in the late 1960s.
Mars has two moons: Phobos and Deimos. Russian scientists in the 1950s posited that Phobos might be hollow, but these claims were discredited in the late 1960s.
Recent sattelite imagery has shown that Mars has a 3 mile deep ice cap around its southern polar region.
Recent sattelite imagery has shown that Mars has a 3 kilometer deep ice cap around its southern polar region.
[[Category:Planets]]
[[Category:Planets]]