+Sleep unfolds in distinct [Sleep Stages](/wiki/sleep_stages), a cyclical journey through varying depths of rest. These include non-REM ([NREM](/wiki/nrem)) phases of progressively deeper slumber and rapid eye movement ([REM](/wiki/rem)) sleep, where vivid dreams often occur. This intricate progression is vital for both physical and mental restoration.
+## See also
+- [Sleep](/wiki/sleep)
+- [Dreams](/wiki/dreams)
+- [Circadian Rhythm](/wiki/circadian_rhythm)
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