I THINK ANN ALTHOUSE HAS WRITTEN ABOUT THIS: How Our Ancestors Used To Sleep Twice A Night. “We used to sleep in two shorter periods, over a longer range of night. This range was about 12 hours long, and began with a sleep of three to four hours, wakefulness of two to three hours, then sleep again until morning.”
InstaPundit is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.