Living Another Day, Thanks to Grandparents Who Couldn’t Sleep by ANERI PATTANI
By ANERI PATTANI
Age-related changes in sleep patterns may have helped early humans survive by ensuring at least one person was always alert to nighttime threats.
Published: July 12, 2017 at 05:00PM
from NYT Science https://www.nytimes.com/2017/07/13/science/hadza-tanzania-sleep-grandparents-evolution.html?partner=IFTTT