Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33
It has been shown that caffeine causes headaches when stopped suddenly and can cause morning headaches that are relieved by a dose of caffeine.
101
Fingernails grow fastest on the hand you favor.
44
If you cut a 'V' shape into your toe nails, you can prevent 'in-grown' toe nails.
22
You're born with 300 bones, but when you get to be an adult, you only have 206!
17
Your thumb is about the same size as your nose.
124