In article , jacobnavia
writes:

The milky way is more than 10Gy old. How a galaxy TWICE AS MASSIVE can
appear in just 945My (z=6) ??

And the authors say that many more galaxies even more massive are
lurking behind, obscured by dust. This confirms what I have reported
here in a previous discussion: the sea of galaxies waiting for us behind
the farthest galaxies that we can see now.

Current cosmology (big bang theory) is coming to an end.

If I go into a cafe and see three people more than 2 metres tall, I
would be surprised. If I surveyed all the people in a large country, I
wouldn't be. The larger the sample, the more we should expect atypical
members of the sample. Check out papers by Peter Coles and Ian Harrison
using extreme-value statistics. They debunk many claims that extremely
large objects somehow contradict established theory. (Interestingly,
Stuart Coles (no relation, as far as I know) at the University of
Bristol has written a book on statistical modeling of extreme values.)