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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.