“Historically human beings naturally slept in two distinct phases, with a period of wakefulness separating the two phases. There is evidence from sleep research, as well as from the reports of individuals, that this bi-modal sleep pattern, combined with a midday nap results in the experience of greater wakefulness during the day time, than uninterruptedRead More
Ekirch’s research found that we didn’t always sleep for an average of 8 hours straight. Instead we would sleep in two shorter periods throughout the night. All sleep would occur within a 12 hour time frame that started with 3 or 4 hours of sleep, followed by being awake for 3 hours or so and then sleeping again until the morning.