Why do we forget dreams so quickly?
Scientists have several theories as to why we forget dreams. Much of our dreaming occurs during REM sleep, a deep period of sleep in which our bodies behave differently to when we are awake. In REM sleep the systems for making new memories don’t seem to work as well, which is why people who wake up from dreams recall them better, as there is a chance for them to pass into waking long-term memory. Our brains are good at filtering out non-essential information to concentrate on more important things, so perhaps most dreams just aren’t important enough to remember.