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Nov 15, 2013 at 19:39 comment added Kevin Kostlan Also, the dyson spheres would have to radiate at a T>cmb in order to expel waste heat.
Nov 15, 2013 at 19:38 comment added Kevin Kostlan "The question is half (or more)-way leaning towards sci-fi" at least physics can explain it!
Jan 14, 2011 at 15:13 history answered Thomas CC BY-SA 2.5