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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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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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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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There are more bacteria in your mouth than there are people in the world.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.