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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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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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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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The human body produces and destroys 15 million blood cells every second.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.