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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.