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Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.
Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.