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Author Question: Biology, and not history, explains why physical characteristics are often used to single out a given ... (Read 21 times) |
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
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Your heart beats over 36 million times a year.