After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
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When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
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Your body is creating and killing about 2.4 million red blood cells per second.
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You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
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