We all dream at night, although we may not remember our dreams in the morning. Although scientists
do not precisely understand how we dream, they have discovered that it is important for us to do so
and people who are prevented from dreaming soon begin to feel unhappy. We are deeply asleep when
we dream, but our brains are active. Scientists think that our brains may be working though the events
of the day, storing memories, making sense of our emotions and preparing us for the next day, Dreams
are often unrealistic or even weird, putting us in odd situations. Bad dreams, called nightmares, may be
particularly vivid and we may be more likely to remember flashes from them because the emotions the
created were so strong that they made us wake up.
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