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One approach to colonizing gas giants is to create a ring above them at the distance gravity is the desired level, such as Earth-normal.
A mushroom habitat is a concept developed for Mercury, for use on airless worlds close to their stars and blasted by intense sunlight.
Black holes are objects of mystery and dread from which nothing can escape… but could they also be the foundations of future civilizations of unimaginable might and size. Watch my exclusive video Topopolis: The Eternal River:...