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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.