For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
There's 100 trillion good bacteria living in your body.
17
The human brain doesn't stop developing until about 25 years old.
102
The human sigh acts as a physiological reset button.
23
A person can live without food for about a month, but only about a week without water.
156
Our Right Lungs takes more air than our left lung.
194
Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
24
Your heart will pump about 212 million liters in its lifetime.
26