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Better than holograms: A new 3-D projection into thin air - GeekRumor
One of the enduring sci-fi moments of the big screen — R2-D2 beaming a 3-D image of Princess Leia into thin air in “Star Wars” — is closer to reality thanks to the smallest of screens: dust-like particles. Scientists have figured out how to manipulate nearly unseen specks in the air and use them …