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Did you know?
There are more bacteria in your mouth than there are people in the world.
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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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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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There are 60,000 miles of blood vessels in every adult human.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.