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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.
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The familiar sounds of your heart are made by the heart's valves as they open and close.