Over one million Pet Rocks were sold in 1975, makine Gary Dahl, of Los Gatos, California, a millionaire. He got the idea while joking with friends about his pet that was easy to take care of, which was a rock.

The world population of chickens is about equal to the number of people.

The strength of early lasers was measured in Gillettes, the number of blue razor blades a given beam could puncture.

AMAZING FACTS