Scientists claim they've calculated a potential new method of time travel involving a theoretical object called a “ring wormhole." Here are the details.

The James Webb Space Telescope has spotted galaxies further away in the universe than any other instrument before. How can we be sure these early galaxies aren't closer and more recent?

Without it, the earliest signals wouldn’t exist, and we’d be unable to look as far back through space and time as we can today. Here’s how quantum physics allows us to see so far back in ...

Arkani-Hamed therefore suspects that the usual notion of quantum particles moving and interacting in space-time is an approximation of deeper, more abstract concepts, which, if found, could serve as a ...

To calculate a star’s mass, just look it its orbital period and do a bit of algebra. To determine what it’s made of, look to the spectrum of light the star emits.