Your body is creating and killing 15 million red blood cells per second.
50
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
The average person's skin weighs twice as much as their brain.
131
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
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.
21
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
Human thigh bones are stronger than concrete!
63