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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.