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It's nothing new to use water or fog as a natural projector-- Disney's been doing that for years to make some of the most insane water shows you've ever seen. But using fog to make honest-to-God, help-me-Obi-Wan 3D holograms? That's the future right there, and it's happening now at Japan's Osaka University. In the video below, originally from Extreme Tech, you can see their projection of a rabbit in mid-air, using several different cameras and a fog cylinder.

No, it's not quite instant communication via hologram, or even something you're likely to see at the movies any time soon. But hey, all technology starts somewhere. When you're paying $50 to see a movie in the latest 3D fog hologram-- fogogram?-- technology, you'll know we warned you.