After reading “Why Mom Wakes before Dad,” an article by LiveScience.com, I found that women have different circadian rhythms from men.  Researchers at Harvard Medical School headed up a study that looked at how easy it was for the participants to fall asleep and stay asleep. Apparently, there are two indicators of circadian rhythm: core body temperature and levels of melatonin.  What I did not know was that the “natural circadian […]