Every dream has a cost. Don't miss Marvel Television's Ironheart, now streaming on Disney . | Disney

Why do we dream? Scientists still don't have a full answer, but one leading theory is that dreaming helps our brains process emotions, store memories and practice problem-solving. REM sleep, the stage when most vivid dreams occur, stimulates the brain regions linked to learning and creativity. Some studies even suggest dreams help us rehearse responses to threats, acting like virtual survival training. While not every dream makes sense, they may serve a crucial role in keeping our minds sharp. S