Possible tensions in the standard model of cosmology, regarding determination of the Hubble constant in the early and late universe, apparently observed by various groups, since the late 2010s:

review:

L. Verde T. Treu, A.G. Riess, Tensions between the Early and the Late Universe (arXiv:1907.10625)

Indication that the tension is not in the data but in systematic errors:

Freedman et al. The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch (arxiv:1907.05922)

Last revised on July 27, 2019 at 06:25:35.
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