For decades, space advocates have promoted a vision of space settlement: people living permanently in space, be it on the moon or Mars, or in self-contained space colonies proposed in the 1970s by Gerard K. O’Neill.
For decades, space advocates have promoted a vision of space settlement: people living permanently in space, be it on the moon or Mars, or in self-contained space colonies proposed in the 1970s by Gerard K. O’Neill.
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