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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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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
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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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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.