The record for the longest scientifically documented period without sleep is 264.4 hours (eleven days).
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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.
46
On average, there's 100 billion neurons in the human brain.
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Gardening is said to be one of the best exercises for maintaining healthy bones.
40
There are 206 bones in the human body!
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Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
70
Your skin is actually an organ.
88
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.
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