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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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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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There are more bacteria in your mouth than there are people in the world.
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The average office desk has 400 times more bacteria on it than a toilet.