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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.