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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The longest a person has survived after a heart transplant is 24 years.
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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.