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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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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).