The Sun Exposure Effect: How Light Sets Your Body Clock and Lifts Your Mood

Every day, light enters your eyes and sets in motion a cascade of biological events that govern your sleep, energy, mood, and even your long-term health. In this illuminating guide, Marcus Reed Halloway unpacks the science of how natural and artificial light shapes your internal clock—the circadian rhythm that regulates nearly every cell in your body. You’ll discover why that first morning light matters more than you think, how to tame late-night screens without giving up technology, and wh...