When Humans Slept Twice: The Science Behind Mediterranean Siesta Culture

This essay reveals that continuous 8-hour sleep is a modern invention tied to industrialized work schedules, not a biological constant. Mediterranean agrarian societies historically practiced polyphasic sleep synchronized with natural light cycles—siesta during long summer days and segmented sleep during long winter nights. By preserving the siesta tradition, contemporary Greece maintains a culturally-rooted practice that more closely aligns with human circadian biology than rigid 9-to-5 scheduling.