We’re willing to bet that at some point in your life, you’ve been advised to “sleep on it”. When wrestling with a difficult problem, going to bed and revisiting it in the morning really does seem to help us see things more clearly – but this is not just a placebo effect. There’s some actual science behind why sleeping on a problem is a good idea. The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

We know sleep is an essential thing for the human body, but for the longest time that was about all scientists were really sure of. The actual functions of sleep were much less clear. Even very widely accepted theories have been challenged by recent research, and there are heaps of studies about what happens in the brain while we sleep,

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