Spiked and studded dog-collars derive from the days of the Ancient Greeks, who would give their sheep-dogs sharply spiked collars to protect their necks from wolves whilst they watched over a Sheppard's flock at night.

In the U.S., over 35 million people have used some sort of illegal drug in the last year.

The world record for time without sleep is 264 hours ( ~11 days) by Randy Gardner in 1965.

AMAZING FACTS