--- In ontheoriginofspecies@y..., tarh7777 <no_reply@y...> wrote:
> ---
> I understand that the evidence is that the universe is expanding but
> the point I was trying to make was that it did have a starting point
> which I understand was about 35 billion years ago. At that time the
> universe started as a single point and of infinite temperature and
> mass in the middle of nothing. It has been expanding ever since.
> What existed prior to BB, who knows, but nothing crossed the line (or
> point) separating the time before and the time after BB. It is thus
> the beginning of everything with our universe and as far as we are
> concerned nothing existed prior to it. I think we are agreeing quite
> abit here.

According to the Big Bang Theory, as well as Relativity, time is a
dimension like the other spatial dimensions, such that the singularity
that expanded into our universe was originally dimensionless with
regard to time. If time has no dimension, it is unmeasurable;
therefore, there can be no "before" the Big Bang, because before is a
relative measure of time and implies dimensionality to something that
is dimensionless.