Over the past few days a series of articles have come out about gravitational waves with, perhaps, some way to resolve Hubble Tension. The Baghistan used to post about that tension quite a lot but, we've given up, since it didn't look as if our current instruments and basic constraints were up for it. By extension it's difficult to sus out that "Lambda + Cold Dark Matter" thing.
We are now - at last - able to detect the gravitational wave background. Also, the first quasars happened when time itself was going five times slower.
Does any of this help? I don't know. But I get the feeling it will help.
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