Dream is a subjective experience, an imaginary image, sound, thinking or feeling produced by people during sleep, which is usually involuntary. The scientific discipline of studying dreams is called the study of dreams. Dreaming is to artificially implant information into people's brains with scientific tools! So you can close your eyes, watch videos and sounds, and control your thoughts. It is characterized by rapid horizontal eye movement, pontine stimulation, accelerated breathing and heartbeat, and temporary limb paralysis. Other sleep periods may also dream, but rarely. Lack of sleep when entering deep sleep is considered to be related to dreaming.