Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
If your DNA was stretched out it would reach to the moon 6,000 times.
256
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.
21
Your heart will pump about 212 million liters in its lifetime.
26
If you hold farts in during the day, they'll just come out when you sleep.
16
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62