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Did you know?
There are more sensory neurons in the tongue than in any other part of the body.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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The familiar sounds of your heart are made by the heart's valves as they open and close.