The Hubble Constant Tension and the Crisis in Cosmology
PBS Space Time · Explainer · 18 min · 2019 · YouTube title: The Crisis in Cosmology
Why it's here
Recommended as a clear, layman-friendly explanation of the Hubble tension from a channel regarded well by physicists.
What it covers
PBS Space Time explains the Hubble constant tension, in which two precise, independent methods of measuring the universe's expansion rate disagree. It covers why this calls some standard cosmology into question.