Eric Barker, Barking Up The Wrong Tree September 9, 2014Roger Ekrich noticed many old books, including Chaucer's "The Canterbury Tales", referenced two periods of sleep being the norm in their era. Via Dreamland: Adventures in the Strange Science of Sleep: ...Ekirch somehow rediscovered a fact of life that was once as common as eating breakfast. Every night, people fell asleep not long after the sun went down and stayed that way until sometime after midnight. This was the first sleep that kept popping up in the old tales. Once a person woke up, he or she would stay that way...
