The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
Obsessive nose picking is called Rhinotillexomania.
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The average person can live for eleven days without water, assuming an average temperature of 60 degrees fahrenheit.
15
Smoking while pregnant increases the chances of spontaneous abortions (miscarriages) stillbirths and premature labor.
77
Ernest Hemingway survived through anthrax, malaria, pneumonia, dysentery, skin cancer, hepatitis, anemia, diabetes, high blood pressure, two plane crashes, a ruptured kidney, a ruptured spleen, a ruptured liver, a crushed vertebra, a fractured skull, and more.
67
When you look up at the blue sky and see white dots flying around, you’re actually seeing your own white blood cells.
30
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
Crushed cockroaches can be applied to a stinging wound to help relieve the pain.
31