Daylight alone is not the only cue for rhythmic entrainment of living systems. The diurnal variations in the Earth’s magnetic field—caused by solar-driven ionospheric currents—are also likely contributors. Here’s a breakdown: 1. Daylight (Photoperiod) This is the most studied zeitgeber (time-giver) for circadian rhythms. Light influences the suprachiasmatic nucleus (SCN) in the brain, which regulates … Continue reading Rhythmic Entrainment of Living Systems