Vortex gets tied in knots | Science News

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Vortex gets tied in knots

Physicists use 3-D printing and tiny bubbles to capture twisted-up water

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5:18pm, March 5, 2013

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Swirling rings of fluid have for the first time been tied in a knot. Physicists accomplished the feat with the help of some unlikely lab tools: YouTube videos of dolphins and a 3-D printer.

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