The Big Bang theory was introduced in 1931, by Georges-Henri Lema

In 1965, Arno Penzias and Robert Wilson discovered cosmic microwave background radiation, the existence of which supports the Big Bang theory.

IF one accepts the big Bang Theory,i do not.
Do we believe that our universe came from some Primeval atom and that our univers is the only one.
That would indicate that there is nothing else out there.This would then pose the age old Question where does Space end.

Since 1965 we have found that wideband noise (microwave radiation) is the result of ionisation in space. Consider that 99.99% of space is hydrogen - ionised into plasma. It is a wideband frequency generator. The Big Bang has lost another of its mainstays.

The other falsified support is that 'redshift' = distance, which has been shown to fall down with galactic bodies, especially quasars. These are now known to be weak ight sources with higher redshift yet they are interconnected with measurably 'close' galaxies.

The Big Bang theory does not state that our universe is the only one out there. It simply states that we got here by combustion.

Thank you for your Comments

It is suppose to mean that the Universe started off as a single point with infinite density and mass,would that mean that there really is infinite mass and density in the Universe?Maybe it would allow for wormholes to exist as E=mc2 and there is (if there is in the first place)infinite energy in the universe? I personally doubt it is true at all.Anyway,this is so confusing.