Science and technology

Associated Press
This publicity image provided by Oculus VR shows a virtual reality headset. The virtual reality headset, the doodad that was supposed to seamlessly transport wearers to three-dimensional virtual worlds, has made a remarkable return at this year's Game Developers Conference. After banking $2.4 million from crowd funding and drumming up hype over the past year, Oculus VR captured the conference's attention this week with a virtual reality headset that's more like a pair of ski goggles than those bulky gaming helmets of the 1990s. (AP Photo/Oculus VR)

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