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There are more nerve cells in one human brain than there are stars in the Milky Way.
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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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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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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.