Space Exploration 118,327 rep 3 gold badges353 silver badges511 bronze badges
Aviation 9,917 rep 1 gold badge30 silver badges36 bronze badges
Lifehacks 6,111 rep 1 gold badge9 silver badges25 bronze badges
Motor Vehicle Maintenance & Repair 4,352 rep 12 silver badges23 bronze badges
Astronomy 2,846 rep 13 silver badges17 bronze badges

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