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SA Special Editions Vol 30 Issue 5s

SA Special Editions

Volume 30, Issue 5s

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Features

Mathematics October 1, 2018

The Unsolvable Problem

After a years-long intellectual journey, three mathematicians have discovered that a problem of central importance in physics is impossible to solve—and that means other big questions may be undecidable, too

Toby S. Cubitt, David Pérez-García, Michael Wolf

Quantum Physics April 1, 2019

Quantum Gravity in the Lab

Physicists attempting to unify the theories of  gravity and quantum mechanics have long thought practical experiments were out of reach, but new proposals offer a chance to test the quantum nature of gravity on a tabletop

Tim Folger