The YKK that you see on zippers stands for Yoshida Kogyo Kabushiki Kaisha which is the name of the founder of the zipper manufacturing company in Japan.

An ordinary TNT bomb involves atomic reaction, and could be called an atomic bomb. What we call an A-bomb involves nuclear reactions and should be called a nuclear bomb.

In a year, the average person walks four miles making his or her bed.

AMAZING FACTS