For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
31
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Pain occurs when sounds are above 130 db.
124
The human brain doesn't stop developing until about 25 years old.
102
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13