Published: December 21, 2018
Trapped layer of cold air keeps water frozen in 50-mile-wide impact crater
The stunning Korolev crater in the northern lowlands of Mars is filled with ice all year round owing to a trapped layer of cold Martian air that keeps the water frozen.
The 50-mile-wide crater contains 530 cubic miles of water ice, as much as Great Bear Lake in northern Canada, and in the centre of the crater the ice is more than a mile thick.
Continue reading...from The Guardian http://bit.ly/2T16Mpa
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