For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
In 30 minutes, the average body gives off enough heat (combined) to bring a half gallon of water to boil.
198
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
There's 100 trillion good bacteria living in your body.
17
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13