July 30, 2015 : Why My Sleep Pattern Is Changing
© 安岡喜晴 (JoyShine)
Lately I started wondering why most mammals are polyphasic sleepers as opposed to humans who are monophasic sleepers.
And when I was in my 20s, I was a monophasic sleeper, but lately I began to feel that my sleep pattern was changing into more polyphasic.
WHY?