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Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
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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 horizontal fraction bar was introduced by the Arabs.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.