The moon, with automated probes dedicated to map every single inch of its surface, is probably less mysterious.

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But their journey will come to an end this Monday, Dec. 17th when the two probes will be deliberately crashed into the surface of the Moon.

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America put a man in space, put a man in orbit, put a man on the moon, created the world's first reusable spacecraft, sent unmanned probes to other planets and led the world in making important scientific discoveries outside the Earth's atmosphere.

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