For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
If your DNA was stretched out it would reach to the moon 6,000 times.
256
It takes approximately 12 hours for food to entirely digest.
93
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Pain occurs when sounds are above 130 db.
124
Enamel is hardest substance in the human body.
61