It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
One human hair can support 3 ounces.
191
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
The human body contains over a billion miles of DNA.
147
If your DNA was stretched out it would reach to the moon 6,000 times.
256