Word: ehret
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Dates: during 1980-1989
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...best-known rhythms are circadian, from the Latin, meaning "about a day." The sleep-wake cycle is the most obvious, but the body's production of hormones also fluctuates significantly over 24 hours. Says Charles Ehret, president of General Chronobionics, a research and consulting company in Hinsdale, Ill.: "Chemically, you are a very different person at noon than you are at night...