Popular Science -
31 Dec 2012 22:00

It was a huge year for 3-D printing technology, which touched everything from sports to chemistry to firearms. Advances in 3-D fabrication enabled some amazing feats of design and ingenuity this year: on-demand running shoes, labware, even body parts. As with any groundbreaking technology, controversy arose, whether it was over a 3-D printed key that can crack open handcuffs or a 3-D printed firearm that could give average Joes on-demand access to guns--no five-day waiting period required. But e...
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