I believe that dreams are our sleeping brains consolidating information. I'm pretty sure that all mammals dream, so this seems to be a fairly safe theory in my mind. Since we spend so much time as infants sleeping, it makes sense that our brains might try to cram as much learning into our heads as fast as possible while we're defenseless. Also, I read somewhere that short term memory gets transferred into long term memory during sleep, so there's that. |
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