An extreme version of vorticity is a vortex. The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes.

The feathers I wore were a borrowed invention I did not truly understand, like Buddhism, Taoism, Tantrism, anythingism […]

The relationship between the Eldonians and Liverpool City Council is very different today to what it was in the late 1970s and early 1980s.

The squadron ground crews and armourers set high standards.