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Technology, Science & Education

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As a student of Nathaniel Kleitman at the University of Chicago, Eugene Aserinsky was studying newborn babies and the blinking of the eyes that had been observed at the onset of sleep. Traveling to the homes of new mothers and babies, Aserinsky sat and watched the eye movements, discovering that the phenomenon occurred off and on throughout the period of sleep. Wondering if it also happened with older children, Aserinsky hooked his own son, Armand, up to a polygraph, attaching a small sensor to the boy's eyelid.

At first it was thought there was a mechanical failure in the equipment, but it was discovered that sleep is punctuated with periods of very rapid eye movement, which came to be known as REM sleep. Aserinsky further noted that these periods of REM sleep come in cycles of about 90 minutes and lasted around 20 minutes. During another study on an adult, Aserinsky heard his subject moaning and talking in his s...

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