ridges

Instead, the final prairie Democrat’s last stand is being waged not on the high plains or the snowy ridges of the eastern Rockies but on the peaks and troughs of the airwaves.

Structures on the top of hills and ridges are at heightened risk, since fires can move up to eight times faster when they are climbing steep slopes than they do on flat land, and lightning strikes from pyrocumulonimbus clouds are more likely to strike elevated locations.

An old tourist sign boasts of a border with Myanmar made of just “bamboo fences, ditches and earth ridges” - a sign of the easy economic relationship Beijing had sought to build with its neighbour.

The dorsal fin is like a dolphin's fingerprint, as each has distinctive notches, ridges and pigmentation.

Park skateboarding takes place on a course - like those seen at local skate parks - with ramps, bends and ridges.