The idea predates Christianity, coming from ancient Babylon, where a paradeiza was an enclosure used for easy hunting.

ECONOMIST: Heaven on earth

This is then used to warm the gorilla enclosure, "but could be used to heat about 25 homes, " he adds.

CNN: Elephant-poo power electrifies zoo

The team's work offers such a sharp picture of the past that it is possible to trace the histories even of individual communities, such as one in Essex whose inhabitants built, used and then abandoned an enclosure within the span of a single generation.

ECONOMIST: The Neolithic

Approximately 6, 000 ground tickets are available each day, and can be used in Court Two's standing enclosure, as well as the unreserved seating and standing on Courts 3-19.

BBC: SPORT | Tennis | Wimbledon venue guide