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Allan Rechtschaffen, an indefatigable sleep researcher at the University of Chicago who tested the effects of sleep deprivation, studied dreaming, narcolepsy, napping and insomnia, and standardized the measurement of sleep stages, died Nov. 29 at his home in Chicago. He was 93.
He studied sleep deprivation, dreams, narcolepsy and insomnia. But he was puzzled by the ultimate question: Why do we sleep?
All around the world, the pandemic provoked strange nocturnal visions. Can they help shed light on the age-old question of why we dream at all?