You might think that sleep and wakefulness, energy and fatigue are just random feelings, but in reality, our bodies have an incredibly sophisticated "biological clock" that governs everything. This internal clock, with a cycle of approximately 24 hours, is primarily controlled by the suprachiasmatic nucleus (SCN) in the brain. It calibrates itself by receiving signals from external light (especially blue light) and coordinates the periodic expression of thousands of genes throughout the body, thereby precisely regulating the fluctuations of almost all physiological processes throughout the day, including body temperature, hormone secretion (such as melatonin and cortisol), metabolism, alertness, and even cell repair. Understanding the biological clock is not just about understanding "when to sleep," but also about understanding the deep key to health, efficiency, and even disease prevention. Our interactive exhibit on the "biological clock," housed in a modernly designed information s
