ice
The thick sheets of ice at these eight sites could provide the reservoir of water necessary for human expeditions to Mars.
Rock salt is great at keeping roads free of ice, but using it over the long term poses serious dangers.
Farewell Moon, we barely knew you. Bill Nye knows the Moon is moving away from Earth 1.48 inches per year. Will it keep drifting further away, and what happens to Earth when it does?
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