Enamel is hardest substance in the human body.
61
Your heart pumps about 2,000 gallons of blood each day!
53
Common pesticides such as roach, termite, and flea insecticide can be found in the bodies of the majority of Americans.
11
It is possible to go blind from smoking too heavily.
50
The human brain uses approximately as much energy as a 10 watt light bulb.
120
There's a new vaccine for alcoholism that gives drinkers an immediate and harsh hangover, even if they drink a small amount of booze.
14
When you look up at the blue sky and see white dots flying around, you’re actually seeing your own white blood cells.
30
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22