It appears that a Chicago-based startup has invented a tractor beam. The device uses over 250 lasers to manipulate small things(cells, etc.) The device could be used in cancer research, nanotech, or other uses. One of the more interesting ones is building 3-d circuts out of normal silicon! It also could be used in nanotechnology to build VERY tiny gears, etc. It costs the same amount as lab equipment, and the University of Minnesota is the only buyer so far.
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