If your DNA was stretched out it would reach to the moon 6,000 times.
256
Enamel is hardest substance in the human body.
61
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
According to a 1950s survey, 75% of men ejaculate within two minutes of penetration.
109
When you take a step, you are using up to 200 muscles.
886
One out of 20 people have an extra rib.
66
The lense of the eye continues to grow throughout a person's life.
34