India, Dec. 20 -- Human beings are closely connected to the Sun. Our body clock, also called the circadian rhythm, depends on natural light to decide when we should feel awake or sleepy. During the winter season, days become shorter and nights become longer. Due to this, many people feel more tired, less energetic, and want to sleep more. This is a natural biological response, not laziness.

A scientific study which was published in Frontiers in Neuroscience, found that human sleep patterns change with seasons. Researchers observed that people experience more REM sleep in winter than in summer. REM sleep is the stage linked to dreaming, memory, and emotional health. Even though total sleep time did not increase much, the quality and struc...