Space Exploration 116,329 rep 3 gold badges347 silver badges502 bronze badges
Aviation 9,827 rep 1 gold badge30 silver badges36 bronze badges
Lifehacks 5,411 rep 9 silver badges23 bronze badges
Motor Vehicle Maintenance & Repair 4,342 rep 12 silver badges23 bronze badges
Astronomy 2,766 rep 12 silver badges16 bronze badges

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