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Ravi Allada (born 1967) is an Indian-American chronobiologist studying the circadian and homeostatic regulation of sleep primarily in the fruit fly Drosophila. He is the Edward C. Stuntz Distinguished Professor of Neuroscience and Chair of the Department of Neurobiology at Northwestern University. Working with Michael Rosbash, he positionally cloned the Drosophila Clock gene. In his laboratory at Northwestern, he discovered a conserved mechanism for circadian control of sleep-wake cycle, as well as circuit mechanisms that manage levels of sleep.