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Anyons don’t fit into either of the two known particle kingdoms. To find them, physicists had to erase the third dimension.
Einstein’s equations describe three canonical configurations of space-time. Now one of these three — important in the study of quantum gravity — has been shown to be inherently unstable.
Two ways of approximating the ultra-complicated math that governs quark particles have recently come into conflict, leaving physicists unsure what their decades-old theory predicts.
Physicists have proposed extra cosmic ingredients that could explain the faster-than-expected expansion of space.
The “pinball” model of a slipping fault line borrows from the mathematics of avalanches.