In agrarian(农业的),pre-industrial Europe, "you'd want to wake up early, start working with the sunrise, have a break to have the largest meal, and then you'd go back to work," says Ken Albala, a professor of history at the University of the Pacific, "Later, at 5 or 6, you'd have a smaller supper." This comfortable cycle, in which the rhythms of the day helped shape the rhythms of the meals,