For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
One human hair can support 3 ounces.
191
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
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
Yawns are more contagious among people with closer relationships.
163