Light on polar vortex

ESA—The polar vortex is a huge mass of frigid air high above the North Pole in the polar stratosphere. It is surrounded by a strong jet of air swirling counter-clockwise along the vortex’s boundary. The…

First Time:Electrons Caught Flowing like Water

We often speak of electrons “flowing” through materials, but in fact, they do not normally move like a liquid. Such “hydrodynamic” electron flow had been predicted, though, and Weizmann Institute of Science researchers recently managed,…