When all is a spin, calm is dragged in

Hurricanes and tornadoes may seem huge, but they’re equivalent to thin flows of fluid at

As disk rotates, spinning dot inside (top left) induces disk rim to enclose (bottom right) region of calm (white spot). Durkin and Fajans

the base of the atmosphere. So, physicists are finding they can mimic these phenomena with

swarms of electrons confined by magnetic and electrical fields.