Over in Australia (unless your reading this in Australia, then its under neath you) scientists have put together a tractor beam that can grab glass particles and pull them several inches. Essential the beam is a laser whose outer ring is hotter than the cooler inner ring...like a donut according to livescience. The beam was directed at small glass spheres, about .008 inches in diameter, those in the inner, cooler portion of the beam were pulled forward. Head over to Livescience for the full run down of how it works, its pretty cool.
Tractor beam, not too far away now.
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