Physicists Have a Major Problem With the Universe

An international astronomy team measured the universe’s expansion rate more precisely, estimating the Hubble constant at about 73.5 km/s per megaparsec.

The result reaches about 1% accuracy and strengthens the gap between observations and predictions from current cosmology.

This sharpens the long-running Hubble tension, which could affect estimates of the universe’s age and the standard cosmological model.

Researchers say the mismatch may point to dark energy details or even new physics beyond today’s framework.