Dreams may make you smart. This was discovered by scientists who do research on dreams.
What is a dream exactly? Scientists explain that during sleep time your brain reviews your experiences in the day. It tries to connect your new experiences with the old memories （记忆）. As your brain connects things, it turns them into a story, and then you get a dream.
Dreams may help you deal with worries and fears. What has happened during the day maybe painful. While you are sleeping, however, the brain will replay the painful memories in a safe dream space. There the bad memories become less painful. And you will feel better after waking up.
Dreams also seem to be able to help you learn. This idea is supported by a study. So scientists advise you not to stay up all night studying, especially when an exam is coming. They say a sweet dream might help you get higher marks.
Dreams may make you more creative, too. It was reported that a famous songwriter came up with his best song in a dream, and wrote it down as soon as he woke up. However, dreams alone can't bring about creativity. In fact, the songwriter spent a lot of time thinking about the song before the dream. In a word, hard work matters （要紧） more for creativity, though dreams also have a role to play.
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