How Aging Changes Sleep Patterns : NPR

This could explain so much! Read the whole (short) article. Cool. - sm

How Aging Changes Sleep Patterns : NPR: "'There are historical records of people sleeping in two bouts at night,' Wehr explains. They called the first bout dead sleep, and the second bout was called morning sleep. The wakeful period in between was referred to as watch or watching.

Before the days of artificial lighting, a winter day could bring 14 hours of solid darkness. People lived from sun to sun."