About The Pillow Period

- Apr 19, 2019-

Sometime between 5 and 23 million years ago tree dwelling great apes began building sleeping platforms, including wooden pillows, to improve their sleep. According to studies on chimpanzees that sleep up to eight to nine hours a night using specifically selected ironwood pillows, sturdy pillows enabled great apes to escape being hunted by night predators and not fall out of the trees while asleep. It is likely that this was necessitated by the evolution of large, energy consuming brains. Though it may also have led to longer periods of REM sleep, that in turn increased their cognitive capacity.