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A comment on Mercury Colonization. Parent comment

Re:Mercury Colonization by Apocryphon on Monday May 20, 2013 @01:17AM (#5736035)
What about underground colonies, deep within the crust?
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Re:Mercury Colonization by arethuza on Monday May 20, 2013 @06:53AM (#5736909)
Things get warm pretty rapidly - most places at roughly 25°C per km of depth

http://en.wikipedia.org/wiki/Geothermal_gradient

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