Two ways of measuring how fast the universe is expanding disagree, a puzzle known as the Hubble tension. Tiny magnetic fields from the Big Bang may offer a solution.

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: NASA, ESA, Joseph Olmsted (STScI) NASA's Hubble Space Telescope has discovered that a ...

There’s a mystery over how quickly the Universe is expanding, and it doesn’t appear to be going away anytime soon. Back in the early 2000s, after decades of astronomers arguing over whether the ...

We have known for several decades that the universe is expanding. Scientists use multiple techniques to measure the present-day expansion rate of the universe, known as the Hubble constant. These ...