Why Do We Dream?
Scientists and sleep experts know when people normally dream. Typically, you dream during the rapid-eye movement(REM) portion of the sleep cycle. You can see when a person is experiencing REM sleep because their eyes zip to and their bodies may twitch and jerk, too. The brain's electrical patterns are very active in this phase, just like when you're awake.
Perhaps dreams are a way to reconcile your past and present experiences to prepare and steel you for the future.
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