Why we Sleep

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Within the brain, sleep enriches a diversity of functions, including our ability to learn, memorize, and make logical decisions.

It recalibrates our emotions, restocks our immune system, fine-tunes our metabolism, and regulates our appetite.

Dreaming creates a virtual reality space in which the brain melds past and present knowledge, inspiring creativity.

In Why We Sleep, preeminent neuroscientist and sleep expert Matthew Walker provides a revolutionary exploration of sleep, examining how it affects every aspect of our physical and mental well-being.

Charting the most cutting-edge scientific breakthroughs, and marshalling his decades of research and clinical practice, Walker explains how we can harness sleep to improve learning, mood and energy levels, regulate hormones, prevent cancer, Alzheimer’s and diabetes, slow the effects of aging, and increase longevity.

He also provides actionable steps towards getting a better night’s sleep every night.

“The best bridge between despair and hope is a good night's sleep.”

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