Interesting facts - Forwarded mails

Who wants to try these out and reply?

1. Chewing on gum while cutting onions can help a person stop producing tears.
2. Until babies are 6 months old, they can breathe and swallow at the same time.
3. Offered a new pen to write with, 97% of all people will write their own name.
4. Males mosquitoes are vegetarian. Only females bite.
5. The average person's field of vision encompasses a 200 degree wide angle.
6. To find out if a watermelon is ripe, knock it, and if it sounds hollow then it is ripe.
7. Babies' eyes do not produce tears until the baby is approximately six to eight weeks old.
8. It snowed in the Sahara Desert in February 1979.
9. Plants watered with warm water grow larger and more quickly than plants watered with cold water.
10. Wearing headphones for just an hour will increase the bacteria in your ear by 700 times.
11. Grapes explode when you put them in the microwave.
12. The stars and colours you see when you rub your eyes are called phosphenes.
13. Our eyes are always the same size from birth, but our nose and ears never stop growing.
14. Everyone's tongue print is different, like fingerprints.
15. Contrary to popular believe, a swallowed chewing gum doesn't stay in the gut. It will pass through the system and excreted.
16. At 40 centigrade, a person losses about 14.4 calories per hour by breathing.
17. There is a hotel in Sweden build entirely out of ice; it is rebuilt every year.
18. Cats, camels and giraffes are the only animals in the world that walk right foot, right foot, left foot, left foot, rather than right foot, left foot.
19. Onions help reduce cholesterol if eaten after a fatty meal.
20. The sound you hear when you crack your knuckles is actually the sound of nitrogen gas bubbles bursting.

Learn anything new? Read it with a pinch of salt. Do let me know if you were to test any of the theories above.