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Project Glass, an enterprise at Google's highly secretive Google X lab, released photos and posted a video to YouTube on Wednesday to preview the search company's long-rumored foray into building a better pair of specs.

"Austin, Texas (CNN) -- Four years ago an unknown startup called MakerBot showed up at the South by Southwest Interactive conference here with a prototype of its first desktop 3-D printer, which spit out plastic replicas of small objects. Bre Pettis, the company's co-founder, took the machine around to Austin's watering holes, set it on the bar and showed off its capabilities by printing shot glasses. "They were pretty popular," he said. On Friday, Pettis was back at SXSW, this time as a keynote speaker before a packed hall of 3,000 people, further evidence that 3-D printing is a hot trend in the tech world. Once again, he brought a new prototype with him."