Stewart Coffin is a maker. In his 95 years, he’s become world-famous for the three-dimensional puzzles he designs and builds.

Despite how often we use our electronic devices, most of us don’t have much of an idea of what goes on inside them. Soldering, circuitry, silicon–it all seems technical and intimidating, and until ...

Continental Drift is one of Henry Segerman’s latest efforts to make mathematics “real.” Henry Segerman, a British American mathematician and mathematical artist at Oklahoma State University, is ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? When 2D puzzles are no longer exciting, 3D brain teasers are the way. These handheld ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When 2D puzzles are no longer exciting, 3D brain teasers are the way. These handheld puzzles require ...