Space Exploration 114,475 rep 2 gold badges336 silver badges494 bronze badges
Aviation 8,262 rep 25 silver badges31 bronze badges
Lifehacks 5,192 rep 9 silver badges23 bronze badges
Motor Vehicle Maintenance & Repair 4,332 rep 12 silver badges23 bronze badges
Astronomy 2,756 rep 12 silver badges16 bronze badges

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