Uncontrolled or covert napping, however, is still probably very common. One need only move through a building surreptitiously and peek at people to find some subset of sleep at any given time. — David F. Dinges Copy Share Image
Uncontrolled or covert napping, however, is still probably very common. One need only move through a building surreptitiously and peek at people to find… — David F. Dinges Copy Share Image
