Acoustic tractor beams use the power of sound to hold particles in mid-air, and unlike magnetic levitation, they can grab most solids, liquids or even small insects and food. For the first t... Read more
Acoustic tractor beams use the power of sound to hold particles in mid-air, and unlike magnetic levitation, they can grab most solids, liquids or even small insects and food. For the first t... Read more
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