Freud thought that dreams were the gateway to our unconscious mind. Today, many scientists think the opposite: that the dreaming brain is quite similar to our awake, conscious state. But dreaming is a very personal experience and one that we can’t share — making the phenomenon very difficult to study. We still don’t know for sure why we dream, but in this episode, we'll hear how psychologists, neuroscientists and philosophers have been trying to answer that question.

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