Mark Olson
  • Member for 4 years
  • Last seen more than a week ago
Science Fiction & Fantasy 31,553 rep 7 gold badges126 silver badges139 bronze badges
Worldbuilding 13,993 rep 1 gold badge37 silver badges53 bronze badges
Astronomy 7,320 rep 17 silver badges27 bronze badges
History 5,267 rep 1 gold badge18 silver badges23 bronze badges
Space Exploration 371 rep 2 silver badges4 bronze badges

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