Tying Water in a Knot (Video)

Here's a robot video that I found interesting:

Reporting in the journal Nature Physics, William Irvine and Dustin Kleckner, physicists at the University of Chicago, describe the knotted fluid vortex they created in the lab -- a scientific first, they say. The knots resemble smoke rings -- except these are made of water, and they're shaped like pretzels, not donuts. Understanding knottiness has extra-large applications, including untangling dynamics of the sun. More SciFri videos Untangling the Hairy Physics of Rapunzel: http://www.sciencefriday.com/segment/04/20/2012/untangling-the-hairy-physics-of-rapunzel.html Dive Into the Physics of Splashing: http://www.sciencefriday.com/video/02/06/2009/dive-into-the-physics-of-splashing.html Cracking the Egg Sprinkler Mystery: http://www.sciencefriday.com/video/05/04/2012/cracking-the-egg-sprinkler-mystery.html
By SciFri

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