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A Tractor Beam Made Of Sound Waves

A Tractor Beam Made Of Sound Waves

Popular Science - By Douglas Main

The device can move around centimeter-sized objects. Tractor beams (short for "attractor beams," which can bring one object closer to another from a distance) are a common trope in science fiction. But could they be made in real life? Researchers made news earlier this year when they created a kind …

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