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Asthma cases in Americans are about 75% higher today than they were in 1980.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.