Vorticity, a measure of the local rotation or swirling motion in a fluid, has long been studied by physicists and mathematicians. The dynamics of vorticity is governed by the famed Navier-Stokes ...

High above the oceans and landmasses, an unseen migration is constantly unfolding. These travelers are aerosols: millions upon millions of microscopic particles so small they can drift for days or ...

What looks like ordinary sand, rocks or snow flowing in one direction can actually hide swirling currents that move in multiple directions beneath the surface. When grains move in a landslide, most ...