Used for water distribution, the Delaware Aqueduct in New York, USA is the longest tunnel in the world (as of 2010). Drilled through solid rock, it reaches a staggering 137 kilometres (85 miles) in length. More tunnel facts.

Gorillas are considered apes, not monkeys. The way to distinguish between an ape and a monkey is that apes do not have tails.

A group of jellyfish is called a smack.

AMAZING FACTS