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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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The horizontal fraction bar was introduced by the Arabs.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Thyroid conditions may make getting pregnant impossible.
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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.