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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.