We all know the telltale hum of a computer's fan kicking on, or the barely-there buzz of fluorescent lights. But even the most whisper-quiet devices are singing their little songs of daily life; you just can't hear them. At least not without some help. Read More >>
Getting microscopic objects into formation is a tricky proposition. They don't make tweezers small enough. Fortunately there's an alternative: sweeping them up in a sonic vortex. Read More >>
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