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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.
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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 immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.
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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.
2008 launch of the SM-3 missile used to destroy American spy satellite USA-193
Assessing for Tinel's Sign
Water Loss Through Evaporation
Growth Chart for American Girls From Birth Through Age 3 Growth slows from infancy to toddlerhood b
The grand opening of the huge Miraflores lock on the Panama Canal in October, 1914. The locks were b