The Lingering Tension in Cosmology and Physics' Critical Imbalance

The Hubble tension, a discrepancy between two methods of measuring the expansion rate of the universe, is causing a problem for the standard model of cosmology. The two methods give completely different answers, and the difference cannot be chalked up to experimental errors. Physicists have suggested fixes, but they must solve the Hubble tension without messing up other domains of cosmology where the standard model gets the right answer. If a solution cannot be found, a revolutionary solution may be required.