Body & Mind
What Your Brain Does While You Sleep
Sleep is when memories get filed — and the brain takes out the trash.
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4 articles
Body & Mind
Your Gut Is Home to Trillions of Microbes
The microbiome, explained — and what we still don’t know.
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Body & Mind
The Man Who First Saw Bacteria
In the 1670s, a Dutch cloth merchant built microscopes no one could match.
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Body & Mind
How Vaccines Teach Your Immune System
A practice run, so the real thing doesn’t catch you off guard.
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