In the book "Why We Sleep" the author (Dr Matthew Walker) gives such a strong set of reasons that he says the wonder is why we ever bother to be awake. It's a

In the book "Why We Sleep" the author (Dr Matthew Walker) gives such a strong set of reasons that he says the wonder is why we ever bother to be awake. It's a very thorough book and certainly convinces you of the tremendous benefits of sleep.