Enamel is hardest substance in the human body.
61
Only 1% of bacteria cause disease in humans!
2
Although men ARE more likely to suffer heart attacks, women are more likely to die within a year from having a heart attack.
50
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
190
It takes 17 muscles to smile, 43 to frown.
65
If your DNA was stretched out it would reach to the moon 6,000 times.
256
You mostly breathe from only one nostril at a time!
75