The Mysterious Flow of Fluid in the Brain

By VERONIQUE GREENWOOD

A popular hypothesis for how the brain clears molecular waste, which may help explain why sleep feels refreshing, is a subject of debate.

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ALGORITHMS

Three Hundred Years Later, a Tool from Isaac Newton Gets an Update

By KEVIN HARTNETT

A simple, widely used mathematical technique can finally be applied to boundlessly complex problems.

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RANDOMNESS

The High Cost of Quantum Randomness Is Dropping

By WEBB WRIGHT

Randomness is essential to some research, but it's always been prohibitively complicated. Now, we can use "pseudorandomness" instead.

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QUANTUM GRAVITY

It Might Be Possible to Detect Gravitons After All

Story by CHARLIE WOOD
Podcast by SUSAN VALOT

A new experimental proposal suggests detecting a particle of gravity is far easier than anyone imagined. Now physicists are debating what it would really prove.

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