An inactive state resembling deep sleep in which certain animals living in cold climates pass the winter. In hibernation, the body temperature is lowered and breathing and heart rates slow down. Hibernation protects the animal from cold and reduces the need for food during the season when food is scarce. Compare estivation.
Does Dreaming Indicate a Good Nightâs Sleep? Dreams are typically indicative of a good nightâs sleep, demonstrating that you have passed through the light sleeping phase (NREM) and entered into a deep sleep (REM).
Depending on who you ask (or which site you visit), a dream can last anywhere from a matter of seconds to 45 minutes. Dream Moods states people dream one to two hours per night, fitting in about four to seven dreams. Dreams last 5 to 9 seconds, and you have a dream cycle near the end of each 90-minute sleep cycle. You need a minimum of 4 dream cycles per night to remain healthy. Most of those dreams are called clearing dreams as we get rid of the emotional baggage and mind-clutter that accumlates thru the day while we dream.