Physicists have succeeding in creating a vortex knot -- a feat akin to tying a smoke ring into a knot. Linked and knotted vortex loops have existed in theory for more than a century, but creating them in the laboratory had previously eluded scientists.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/3...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/3...