Human multidien rhythms

For centuries, scholars have sought temporal patterns in health and disease. Fertility, growth, sleep, mood, digestion, paroxysmal brain and cardiac disorders have all been proposed to be organized with temporal regularity. Ancient texts attest to the idea that celestial motion could cyclically influence the inner workings of the human body. Indeed, the circadian rhythm (∼24 hour) was found to be paced by the rotation of the earth and the...