All rainforests are jungles but not all jungles are rainforests. Rainforests are tropical jungles with at least 80in of rainfall a year.
Rainforests have canopies of thick vegetation shielding the ground from the sun.
About six per cent of the Earth's land mass is classified as jungle.
It is estimated that 57 per cent of the species of plant and animal life on planet Earth live in jungles.
In the billion-word Oxford English Corpus, the descriptive term that most frequently precedes the word 'jungle' is 'concrete'.
The films The Asphalt Jungle (1950) and The Blackboard Jungle (1955) each received four Oscar nominations but neither won any. Walt Disney's The Jungle Book (1967) also received one Oscar nomination and failed to win.
The word 'jungle' comes from a Sanskrit word meaning uncultivated land or desert.