CNN: A new study suggests that someone in the middle of a vivid dream can understand questions and even answer them.

Dreams have been widely studied, and experts are still trying to understand why we have them, how dream scenarios are created, and whether dreaming benefits brain function.

But remembered dreams are often full of forgotten details and distortions, so experts from Northwestern University wanted to speak to people as they dreamt in real time, to learn more about why dreams happen, and how they might be useful for mental function.

Scientists attempted to speak to people during lucid dreams. While lucid dreaming, people report that they are aware that they are dreaming, and often say they are able to direct or manipulate the dream’s content to some degree.

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