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.
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During a typical human life span, the human heart will beat approximately 2.5 billion times.
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The brain can stay alive for 4 to 6 minutes without oxygen. After that cells begin die.
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Men have larger hearts; women's hearts beat faster.
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By weight, Bone is five times stronger than steel.
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Chewing gum boosts your brain power.
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Fingernails grow nearly 4 times faster than toenails.
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