How do dreams occur, and what are some theories about their purpose and significance?
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Dreams occur during the rapid eye movement (REM) stage of sleep, when brain activity increases and resembles that of wakefulness. The purpose and significance of dreams are subject to various theories, including the idea that they serve as a form of memory consolidation, emotional processing, problem-solving, or simply the brain’s way of making sense of random neural activity. Dreams have been a source of fascination and interpretation throughout history and across cultures.