The force awakens: tractor beam becomes a reality | Science | The Guardian - discu.eu

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Sonic tractor beams that can lift and move objects using soundwaves http://www.theguardian.com/science/2015/oct/27/the-force-awakens-tractor-beam-becomes-a-reality 18 comments 28/10/2015

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Sound, light and water waves and how scientists worked out the mathematics | Mathematics | The Guardian http://www.theguardian.com/science/2014/feb/12/sound-light-water-waves-principle-mathematics 0 comments

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