First spotted at the top of ships' masts (where they were considered a good omen), Saint Elmo's fires are typically seen around tall metal grounded objects, such as lightning rods, aircraft wings, and chimney tops.

Karou took the plate of couscous and vegetables.

It is not obvious, to economists anyway, that cities should exist at all. Crowds of people mean congestion and costly land and labour. But there are also well-known advantages to bunching up. When transport costs are sufficiently high a firm can spend more money shipping goods to clusters of consumers than it saves on cheap land and labour.

an axless truck assembly