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And why do we have them? Scientists are learning to find the reasons, but they still know very little about why we dream.
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Modern research can tell us some important facts about dreams. For example, we have most of our dreams during REM sleep. At this time，the brain is very active. Another fact is that everyone dreams-even if we cannot remember doing so when we're awaken. What's more, an unusual part of our brain has been found. This part sometimes puts our thoughts and memories together in strange ways when we're asleep.
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Some scientists believe that our dreams are associated with life experiences and things in the dreams have their own meanings. For example, telephones in dreams are thought to be about giving or receiving an important message. A car in dreams often mean feelings about your own life. Broken teeth show fear.
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Scientists think that people in our dreams can tell us something about ourselves. If the person in the dream was shouting out, for example, maybe you are angry. If he or she was scared in the dream, then maybe you're afraid of something in life.
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There is still a lot that we do not understand, but scientists are trying hard because the more we learn about our dreams, the more we learn about ourselves.
A.What're the meanings of the things in dreams?
B.What can persons in dreams tell us?
C.Why should we learn more about dreams?
D.What facts do we know about dreams?
E.What are dreams?
