I’ve gone from nap detractor to nap devotee, from someone ashamed to nap to someone who relishes the coffee-then-nap combination known as the “nappuccino.”*

references to a “second” or “morning” sleep. The picture he began to piece together of human sleep before the industrial era was not one anyone had ever remarked on before. It appeared that people slept in two bouts: an evening bout, which lasted from about 9 p.m. to sometime after midnight, and a morning bout, which lasted from around 2 a.m. to da