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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Your heart beats over 36 million times a year.
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
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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.