A dream is a series of images, ideas, emotions, and sensations which generally happen unwillingly in the mind in certain stages of sleep. Dream is dependent on the condition and situation of the human beings in their life. If an individual is a student then he dreams for good marks. If a person is jobless and unmarried then he dreams for job and married life so the examples make it clear that the mostly dreams are dependent on the situation of life of a person. Some people see unexpected dreams related witch or other types.
Dreaming occurs during Rapid Eye Movement (R.E.M) sleep which most mammals also experience. The director of Evolutionary Neurobehavioral Laboratory at Boston University says that as mammals experience