During a typical human life span, the human heart will beat approximately 2.5 billion times.
21
A human being loses an average of 40 to 100 strands of hair a day.
133
Crushed cockroaches can be applied to a stinging wound to help relieve the pain.
31
Scientists estimate that laughing 100 times is equivalent to a 10-minute workout on a rowing machine.
202
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22
Pain travels through the body at 350 feet per second!
23
Your tongue is the only muscle in your body that is attached at only one end.
173
35,000 people in the U.S. will die from the flu annually.
6