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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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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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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.