Why do we dream or have nightmares? Some say that dreaming helps manage our memories, or it may be a way to rehearse outside threats. Dreaming can give us clues into our psyches. Cover Image: Blend Images/Shutterstock
It's amazing that most of us do not experience a nightmare every night.
Why we dream is still one of the behavioral sciences' greatest unanswered questions. Researchers have offered many theories—memory consolidation, emotional regulation, threat simulation—but a unified one remains, well, a pipe dream.