Fluid Knots
I have enough trouble making tying knots with my shoelaces, so this is doubly aw... ...of Chicago, Illinois, have created a 3D knot in a fluid. To investigate, Dust... ...rips of plastic shaped into a trefoil knot and a Hopf link....
http://www.neatorama.com/2013/03/05/Fluid-Knots/



