Summary:
- This article discusses the critical role of the James Webb Space Telescope (JWST) in refining our understanding of the "Hubble tension," a significant discrepancy in measurements of the universe's expansion rate.
- It details how new high-resolution infrared observations have confirmed previous measurements of Cepheid variable stars, effectively ruling out measurement errors as the cause of the tension and suggesting that new physics may be required to explain the evolution of the cosmos.