The most distant galaxies

The most distant galaxies in the Hubble Deep Field
show insufficient evidence of evolution, with some
of them having higher redshifts (z = 6-7) than the
highest-redshift quasars.
The Big Bang requires that stars, quasars and galaxies in the early
universe be “primitive,” meaning mostly metal-free, because it
requires many generations of supernovae to build up metal content in
stars. But the latest evidence suggests lots of metal in the “earliest”

quasars and galaxies. [31,32,33] Moreover, we now have evidence
for numerous ordinary galaxies in what the Big Bang expected to be
the “dark age” of evolution of the universe, when the light of the few
primitive galaxies in existence would be blocked from view by
hydrogen clouds. [34]