String theory, at least on paper, seems to have succeeded. Gravity not only fits in with quantum behavior — it is actually required by string theory. But here’s the problem: string theory is exciting ...

String theory is perhaps the most high-profile candidate for what physicists call a theory of everything – a single mathematical framework capable of describing the entirety of the known universe. The ...

It’s not easy being a “theory of everything.” A TOE has the very tough job of fitting gravity into the quantum laws of nature in such a way that, on large scales, gravity looks like curves in the ...

Paul M. Sutter is an astrophysicist at SUNY Stony Brook and the Flatiron Institute, host Ask a Spaceman and Space Radio, and author of "Your Place in the Universe." Sutter contributed this article to ...