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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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Everyone has one nostril that is larger than the other.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.