An anonymous reader writes: According to the BBC, engineers in Bristol, England have created a system for remote manipulation of physical objects using sound holograms. The video shows pea-sized objects being dragged around and stacked up in mid-air with no visible means of support. "In essence, an object sitting in a 'quiet' region of space can be held there if it is surrounded by very high-intensity sound waves. As the pattern of that boundary shifts, the object can be moved around." If the Empire is making a tractor beam, now they only need a Death Star to go with it.
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