From StarTalk.

The universe’s expansion rate doesn’t match across different measurements, suggesting either our models are incomplete or there are undiscovered forces or fields affecting cosmic evolution. This "Hubble tension" challenges our current understanding of cosmology and may hint at new physics.

From ‘Answering Questions about Hubble Tension, Dyson Spheres, & Relativity’: https://youtu.be/y8b93R3kfso?si=00o3TaIY9RJifycM

Get the StarTalk book, ‘To Infinity and Beyond: A Journey of Cosmic Discovery’ on Amazon: https://amzn.to/3PL0NFn

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