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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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The human body produces and destroys 15 million blood cells every second.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.