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The Problem With Dreaming
Are our dreams full of messages and warnings? For most of human history, that's been the common view. In the 19th century, dreams began to be studied more scientifically. Perhaps there's something going on in our brains that causes us to dream. Russell Foster is director of the Sleep and Circadian Neuroscience Institute at the University of Oxford. He has written a book called Life Time about how sleep can revolutionise your life.