Space Exploration 117,657 rep 3 gold badges350 silver badges509 bronze badges
Aviation 9,897 rep 1 gold badge30 silver badges36 bronze badges
Lifehacks 6,041 rep 1 gold badge9 silver badges24 bronze badges
Motor Vehicle Maintenance & Repair 4,352 rep 12 silver badges23 bronze badges
Astronomy 2,816 rep 13 silver badges17 bronze badges

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