> So does this require new physics to solve? Not necessarily. First the distance ladder could have another problem. Second to look at the early universe, for t

> So does this require new physics to solve? Not necessarily. First the distance ladder could have another problem. Second to look at the early universe, for the early universe observations you are looking through the entire universe at the CMB and that requires foreground subtraction, which is very much a non trivial task. And finally from theory, General Relativity is a non-linear theory which means taking the average and then evolving the average does not necessarily yield the same result as evolving the initial state and then taking the average. Either of this could explain the tension, though an actually dynamic cosmological constant would be more fun.