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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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The average office desk has 400 times more bacteria on it than a toilet.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.