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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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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.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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There are 60,000 miles of blood vessels in every adult human.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.