Parul R. Sheth

Almost every form of life, plant, animal or human being has an internal clock for measuring time, giving rise to rhythms. Rhythms are controlled by a biological clock situated in the brain. This clock strongly relies on sunlight and darkness. In humans, too, there are internal clocks that regulate metabolism, physiology and behavior. When we are well, our body rhythms work in synchrony but illness, travel across multiple time zones, shift work schedules, etc. ...