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There are 20 feet of blood vessels in each square inch of human skin.

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Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

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Your heart beats over 36 million times a year.

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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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