The human brain is more active during sleep than during the day.
28
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
