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There IS water on Mars, but it's saltwater and not exactly fit for human consumption. How would you use it?

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  • Boil out the salt, and condense the steam into clean water…duh.

  • Rub it on my face — salt is a natural exfoliator!

  • Recharge my ship’s batteries; it’s really not as hard as it sounds.

  • Use it to cool the ship’s generators.

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