Rarely do tidally bound worlds invent the lightbulb. The day side does not need it, the evening side evolves architecture that makes the most efficient use of light, the near night side (only recently colonized) is lit by gargantuan mirror arrays
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by complete coincidence, offline today I learned that historic mines really used to be lit by mirrors, they had light shafts and people on top whose job it was to track the sun with their mirror
Thanks. Twitter will use this to make your timeline better. UndoUndo
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