Instant Genius is a bite-sized masterclass in podcast form. In this week's episode, we talk to Dr Matthew Walker, author of the book Why We Sleep (£10.99, Penguin).

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Matthew tells us about how sleep evolved and what happens when we don’t get enough.

And if that's not enough, you can hear even more from Matthew on Instant Genius Extra.

On this subscription-only show, available on Apple Podcasts, we take a deeper dive into the topics covered on Instant Genius. In this episode, Matthew tells us about the science of dreams, and his book.

Let us know what you think of the episode with a review or a comment wherever you listen to your podcasts.

Listen to more episodes of Instant Genius:

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Authors

Sara RigbyOnline staff writer, BBC Science Focus

Sara is the online staff writer at BBC Science Focus. She has an MPhys in mathematical physics and loves all things space, dinosaurs and dogs.

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