String theory unifies all the forces of nature. Forces that seem very different, such as gravity and electricity, are deeply related to one another. The forces are linked by so-called dualities: the ...

There are gazillions of different possible universes that can be described and understood using the tools provided by string theory ...

AdS/CFT suggests that our three-dimensional universe can be modeled by a two-dimensional surface. AdS (Anti-de Sitter space) ...

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All you need is some string. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Has the universe been around forever? If so, perhaps it's been ...

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

In fact, everything in the cosmos, including space and time, could be composed of little strings. If this sounds too weird, consider that many theoretical physicists are convinced that it s true. S.

For more than a century, physicists have suspected that the familiar three dimensions of space and one of time might be only ...

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But despite its extraordinary popularity among some of the smartest people on the planet, string theory hasn’t been embraced by everyone–and now, nearly 30 years after it made its initial splash, some ...