Don't give a dog chocolate! Chocolate affects a dog's heart and nervous system; a few ounces are enough to kill a small dog. See more

It is impossible for a human to lick their elbow. See more

10% of human dry weight comes from bacteria. See more

The cockroach has a high resistance to radiation and is the creature most likely to survive a nuclear war. See more

A boeing 747's wingspan is longer than the Wright brothers' first flight (120 feet/36 meters). See more

There are more bacteria in your mouth than the human population of the U.S.A. and Canada combined. See more

Butterflies taste with their feet. See more

It takes about 20 seconds for a red blood cell to circle the whole body. See more

Human thigh bones are stronger than concrete. See more

One quarter of the bones in your body, are in your feet. See more

In a year, your heart can beat up to 40,000,000 times!. See more