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We’ve mastered acoustic levitation – and it is surprisingly useful

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Sonic tractor beams lift and manipulate objects with sound waves. They could be used to precisely deliver drugs inside our bodies or assemble delicate computer chips in mid air

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New kind of blue found in cabbage could replace synthetic food dye

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Octopuses may be able to dream and change colour when sleeping
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Octopuses may be able to dream and change colour when sleeping

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