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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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People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

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Everyone has one nostril that is larger than the other.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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