[escape_goat]

Back here on the lay benches, I think the best starting point in the Wikipedia is probably the the article on inhomogenous cosmology, of which the Timescape Comsology proposed by David Wiltshire (listed as an author on this paper) in 2007 is a notable example; it is discussed in the article.

<https://en.wikipedia.org/wiki/Inhomogeneous_cosmology>

[Gooblebrai]

This is a mind-blowing theory!