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The Nuance

Why Do We Sleep? Science May Have Finally Figured It Out

Your brain is equipped with a waste management system that does most of its work while you slumber

Photo: Lux Graves/Unsplash

Two centuries ago, the Scottish physician Robert Macnish theorized that the purpose of sleep was to “renovate the mind” by offering it a period of deep repose.

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Markham Heid

Markham Heid

I write about health, science, and psychology. My work has appeared in Time magazine, the New York Times, Vice, and elsewhere. I live in Germany.

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