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Tuesday, November 3, 2020

Alien Societies in Science Fiction

Stephen H. Doyle, in Habitable Planets for Man, attempted to estimate the abundance of planets in which human beings could live without life-support systems such as domes or spacesuits. He estimated that there were something like 600 million human-habitable planets in our galaxy alone. Other galaxies should have comparable numbers.

Stanley Schmidt, Aliens and Alien Societies, 1995 

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