You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
The average person's skin weighs twice as much as their brain.
131
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
There are about 1,400 different species of bacteria in your belly button.
10
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
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
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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