The human body contains over a billion miles of DNA.
147
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
There's 100 trillion good bacteria living in your body.
17
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
