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Submission + - Dr. Who's sonic screwdriver a step closer to reality? (

cylonlover writes: A University of Dundee research team led by Prof. Mike MacDonald has demonstrated that both levitation and twisting forces can be applied to an object by application of ultrasonic beams. The team of physicists at the University of Dundee in Scotland (with associates at Bristol University in England) have succeeded in generating an ultrasonic vortex beam strong enough to lift and rotate a rubber disk submerged in water. This latest breakthrough is part of a wide-ranging U.K. research effort to develop a device not unlike the "sonic screwdriver" made famous by the TV series Doctor Who.
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Dr. Who's sonic screwdriver a step closer to reality?

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We all agree on the necessity of compromise. We just can't agree on when it's necessary to compromise. -- Larry Wall