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Dreaming is the perception of sensory images during sleep, in a sequence which the sleeper/dreamer usually perceives more as an apparent participant than an observer. Dreaming is stimulated by the pons and mostly occurs during the REM phase of sleep.
People have proposed many hypotheses about the functions of dreaming. Sigmund Freud postulated that dreams are the symbolic expression of frustrated desires that had been relegated to the subconscious, and he used dream interpretation in the form of psychoanalysis to uncover these desires. Scientists have become skeptical about the Freudian interpretation, and place more emphasis on dreaming as a requirement for organization and consolidation of recent memory and experience. See Freud: The Interpretation of Dreams
Sleep is a natural state of bodily rest observed throughout the animal kingdom. It is common to all mammals and birds, and is also seen in many reptiles, amphibians and fish. In humans, other mammals, and a substantial majority of other animals which have been studied — such as fish, birds, ants, and fruit-flies — regular sleep is essential for survival. However, its purposes are only partly clear and are the subject of intense research.
Hours by age
Children need a greater amount of sleep per day than adults to develop and function properly: up to 18 hours for newborn babies, with a declining rate as a child ages. A newborn baby spends almost half of its sleep time in REM-sleep. By the age of five or so, only a bit over two hours are spent in REM.Age Average amount of sleep per day
Newborn up to 18 hours
1-12 months 14–18 hours
1-3 years 12-15 hours
3-5 years 11-13 hours
5-12 years 9-11 hours
Adolescents 9-10 hours
Adults, including elderly 7-8 (+) hours
Pregnant women 8 (+) hours
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Thomas Jefferson
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George Bernard Shaw
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Love is blind -- marriage is the eye-opener.
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The best part of married life is the fights. The rests is merely so.
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