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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
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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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People about to have surgery must tell their health care providers about all supplements they take.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.