A snail can sleep for 3 years. A rhinoceros horn is made of compacted hair. A polar bear's skin is black. Its fur is not white, but actually clear. If you keep a Goldfish in the dark room, it will eventually turn white.
Women blink nearly twice as much as men.
A shark can detect one part of blood in 100 million parts of water. A rat can last longer without water than a camel. Your stomach has to produce a new layer of mucus every two weeks otherwise it will digest itself. A raisin dropped in a glass of fresh champagne will bounce up and down continually from the bottom of the glass to the top. A person cannot taste food unless it is mixed with saliva.