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The longest a person has survived after a heart transplant is 24 years.
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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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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").