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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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There are more bacteria in your mouth than there are people in the world.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.