The adult human brain weighs about 3 pounds (1,300-1,400 g).
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For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
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The average sperm cell swims at 8 inches per hour.
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Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
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The largest cell in the human body is the female egg and the smallest is the male sperm.
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Chewing gum boosts your brain power.
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Our eyes are always the same size from birth, but our nose and ears never stop growing.
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The human brain has the capacity to store everything that you experience.
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