The world seems to be full of illusions—and we're not talking about fake news from Macedonia.
Holograms appear to be all around us now. Long-dead rapper Tupac Shakur showed up at the 2012 edition of the Coachella music festival. Microsoft's HoloLens seems akin to a wearables version of Star Trek's holodeck, allowing its user to interact with 3D objects in an augmented reality. Startups like Edinburgh-based Holoxica can create digital 3D holograms of human organs for medical visualization purposes.
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