Giraffes often sleep for only 20 minutes in any 24 hours. They may sleep up to 2 hours (in spurts – not all at once), but this is rare. They never lie down.

The call of the humpback whale is louder than Concorde and can be heard from 500 miles away.

Chewing gum was invented in New York City in 1870 by Thomas Adams.

AMAZING FACTS