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.

In 1924, Kleenex tissues were originally designed as a cold cream remover.

The first fossilized specimen of Australopithecus afarenisis was named Lucy after the paleontologists' favorite song "Lucy in the Sky with Diamonds," by the Beatles.

AMAZING FACTS