Current physics is speeding toward a breaking point, as astronomers confirm that the Hubble tension in new data.

It’s a powerful technique, but small uncertainties at each step can add up, something critics argue may be behind the Hubble ...

Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their ...

The universe is expanding, but astronomers still cannot agree on exactly how fast. That mismatch, known as the Hubble tension ...