ythm is a cycle that occurs at least once every 24 hours, like sleeping, or change in body temperature. These rhythms are controlled by the body's 'biological clock' located in the hypothalamus, called the SCN (suprachiasmatic nucleus). The SCN regulates our body's melatonin and produces internal synchronization. When certain cycles are thrown out of their usual cycle, the result is internal desynchronization.
             There are various reasons that we have to sleep. Some of the reasons are that our bodies need an occasional 'time out
             ...