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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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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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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 familiar sounds of your heart are made by the heart's valves as they open and close.

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Illicit drug use costs the United States approximately $181 billion every year.

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