1. Your thumb is the same length of your nose.

2. When you are looking at someone you love, your pupils dilate, and they do the same when you are looking at someone you hate.

3. Your teeth start growing 6 months before you are born.

4. The enamel in your teeth is the hardest substance in your body.

5. Your body gives off enough heat in 30 minutes to bring half a gallon of water to a boil.

6. There are about one trillion bacteria on each of your feet.

7. At the moment of conception, you spent about half an hour as a single cell.

8. Men without hair on their chests are more likely to get cirrhosis of the liver than men with hair.

9. The average human dream lasts 2-3 seconds.

10. It takes the food seven seconds to get from your mouth to your stomach.

11. The human brain cell can hold 5 times as much information as the Encyclopedia Britannica.

12. The acid in your stomach is strong enough to dissolve razor blades.

13. A full bladder is roughly the size of a soft ball.

14. A pair of human feet contains 250,000 sweat glands.

15. Your big toes have two bones each while the rest have three.

16. The average woman is 5 inches shorter than the average man.

17. You use 200 muscles to take one step.

18. The largest cell in the human body is the female egg and the smallest is the male sperm.

19. Scientists say the higher your I.Q. The more you dream.