Enamel is hardest substance in the human body.
61
Every year your body replaces 98% of your atoms.
119
Our Right Lungs takes more air than our left lung.
194
The human brain doesn't stop developing until about 25 years old.
102
It takes about 20 seconds for a red blood cell to circle the whole body.
102
If your DNA was stretched out it would reach to the moon 6,000 times.
256
One human hair can support 3 ounces.
191