More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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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 familiar sounds of your heart are made by the heart's valves as they open and close.
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The average adult has about 21 square feet of skin.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
Nurses, here to serve
Andrew Jackson as president.
In 2008, Barack Obama was elected president of the United States, the first minority to achieve this ...