Feature
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- Health & Medicine
Residents of the brain
It's a zoo in there: Scientists turn up startling diversity among neurons.
- Health & Medicine
The Power of D
Sunshine vitamin’s potential health benefits stir up, split scientists.
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Evolution’s Wedges
Finding the genes that drive one species into two.
- Earth
Death of a Continent, Birth of an Ocean
Africa’s Afar region gives glimpses of geology in action.
