Scientists are on the trail of a mysterious five-particle structure that could challenge one of the biggest theories in physics: string theory. This rare particle—never seen before and predicted not ...

A philandering string theorist is caught with another woman by his wife. “But darling,” he pleads, “I can explain everything!” I didn’t invent the joke; it appeared in the satirical magazine The Onion ...

String theory began over 50 years ago as a way to understand the strong nuclear force. Since then, it’s grown to become a theory of everything, capable of explaining the nature of every particle, ...