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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Excessive alcohol use costs the country approximately $235 billion every year.
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Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.