Imagine a hurricane with an eye in the shape of a propeller amid the swirling clouds. Physicists have observed something almost as strange in whirlpools that they made by swirling liquids in a novel way. Within the whirlpools, they’ve seen three-blade-propeller shapes as well as regular polygons, including squares and hexagons.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.