We Never Know
No Slack
Sheesh louise............
I can only repeat myself: there is no "before" T = 0. By definition.
The beginning of the universe = the beginning of time.
There is no "before" time. Just like there is no north of absolute north.
Yes, it's hard to wrap our human head around that one.
Doesn't change the fact that it makes no sense to talk about "before" when there is no timeframe for "before" to exist.
The Big Bang Theory is the leading explanation about how the universe began.
The basics of the theory are fairly simple. In short, the Big Bang states that all of the current and past matter in the Universe came into existence at the same time, roughly 13.8 billion years ago when all matter was compacted into a very small ball with infinite density and intense heat called a Singularity. Suddenly, the Singularity began expanding, and the universe as we know it began.
Without time there could be no heat.