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.

The common idea that only 10% of the brain is used it not true as it is impossible to determine the actual percentage because of the complexity of the brain.

Antarctica has as much ice as the Atlantic Ocean has water.

AMAZING FACTS