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.

The largest hailstone ever recorded in the U.S. was 17.5 inches around.

The Nike swoosh was designed by a Portland State University student, and purchased by Nike for $35.

AMAZING FACTS