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Cleaned up grammar and sentence structure.

Could meteorites prevent Mars exploration?

Meteorite damage probability is low both on Mars and Earth, but Earth has thick atmosphere, which Mars does not. The thinner atmosphere on Mars should yield some increase of damage probability.

would this increase be unacceptable by a Mars colony? Suppose Musk's (and our all) dreams are realised. How often will meteorites hit some Martian city with several square kilometers of area?

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