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Tractor Beam Breakthrough Could Lead to Levitating Humans

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Virtual vortices

A styrofoam particle of 1.6cm (1.88 wavelengths of sound) trapped in the center of a "tornado" of ultrasonic waves.

Credit: University of Bristol

Tractor beams have made the jump from science fiction to reality in recent years, but only for levitating very small objects.

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