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Orrery (Earth, Moon, and Sun): This Instructable describes the design and construction of an orrery – a clockwork mechanism depicting the motions of celestial bodies. This particular orrery is a type of "tellurion" because it features the Earth, Moon, and Sun. I've desi…

My 3D-printed custom nose bridge. Images courtesy of the author I wear glasses (not pictured above for photo reasons), and for the last nine months they’ve fogged up every time I’ve gone outside. For some reason, I haven’t been able to find a mask that’s comfortable and keeps my breath from blowing up into my glasses. Thanks to the magic of 3D printing, I’ve come up with a solution, and it works surprisingly well. And you can do it, too, if you have access to a 3D printer, some free s...