Stylised illustration of a human brain, with two hands holding pipe-like tubes connected to the brainstem, suggesting a plumbing system.

A controversial Alzheimer’s surgery is said to reverse symptoms — here’s what scientists know

Jaw-dropping patient videos and miraculous testimonials ignited a frenzy in China over a technique that aims to improve drainage from the brain. Now it is entering trials worldwide.

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Microscope image of engineered RNA nanostars

Nanoscience and nanotechnology

From programmable RNA architectures to next-generation materials for energy and health care, researchers are harnessing the unusual properties of the nanoscale to tackle some of society’s biggest challenges.
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