Although the Stegosaurus dinosaur was over 9 metres long, its brain was only the size of a walnut.

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.

Cows give more milk when they listen to music.

AMAZING FACTS