// Latest New Scientist says we don't know the answer for certain. //
OG keep up
that is the answer for which one is correct ....
before the Big Bang ( courtesy of Fred Hoyle ) there was the ..... steady state theory
Einstein looked at his equations and realised that under certain circs it would expand so he put in a little adjuster to make it stay still
the cosmological constant
and he later called it the greatest mistake of his life
see
https://en.wikipedia.org/wiki/Cosmological_constant