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Asthma cases in Americans are about 75% higher today than they were in 1980.
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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 modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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