There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
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
The average person's skin weighs twice as much as their brain.
131
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
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
A person can live without food for about a month, but only about a week without water.
156
Your thumb is about the same size as your nose.
124