Elvis Presley was obsessed with brushing his teeth.

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 Main Library at Indiana University sinks over an inch every year because when it was built engineers failed to take into account the weight of all the books that would occupy the building.

AMAZING FACTS