Archives: Quanta

A newfound hub of immune system activity at the back of the brain solves a century-old puzzle and offers a possible target for treatments.

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Ultrahigh-energy cosmic rays twist and turn on their way to Earth, which has made it nearly impossible to identify the colossal monsters that create them.

Researchers have proved a special case of the Erdős-Hajnal conjecture, which shows what happens in graphs that exclude anything resembling a pentagon.

The thorny thought experiment has been turned into a real experiment — one that physicists use to probe the physics of information.

Two new approaches allow deep neural networks to solve entire families of partial differential equations, making it easier to model complicated systems and to do so orders of magnitude faster.

Some populations of neurons simultaneously process sensations and memories. New work shows how the brain rotates those representations to prevent interference.

Radio waves, longer and less energetic than visible light, give astronomers access to some of the most obscure physics in the cosmos.

Inside the symmetries of a crystal shape, a postdoctoral researcher has unearthed a counterexample to a basic conjecture about multiplicative inverses.

A patchwork of genomic differences in the placenta may explain the organ’s “live fast, die young” strategy and its connections to cancer.


Fifty years ago, Paul Erdős and two other mathematicians came up with a graph theory problem that they thought they might solve on the spot. A team of mathematicians has finally settled it.