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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Vaccines prevent between 2.5 and 4 million deaths every year.