The Importance of Sleep

Our body clock keeps us in time with circadian rhythms. Circadian means a full day cycle so that our bodies know to be awake during the day and asleep at night time. The first stage of sleep is pretty quick, it only lasts a few minutes. But even though our bodies are asleep, our brains are busy. It's about to get busier. So we don't have to keep all of our thoughts in our brains.