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Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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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 highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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The average adult has about 21 square feet of skin.
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The human body produces and destroys 15 million blood cells every second.