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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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The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Cyanide works by making the human body unable to use oxygen.
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Asthma cases in Americans are about 75% higher today than they were in 1980.