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The familiar sounds of your heart are made by the heart's valves as they open and close.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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The average adult has about 21 square feet of skin.
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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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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.