The big bang theory postulates that at some moment all of space was contained in a single point from which the universe has been expanding. Are there any explanations given by science about how that particular single point created?

[SciTechPress]

Actually, the Big Bang theory does not postulate that the universe was all contained in a single point. The theory only postuates that early in the universe, it was extremely compact, hot, and expanding rapidly. It makes no attempt to extrapolate to zero time, because the math fails, and every professional in the business thinks that a failure in the math means that there is some new physics principle at work that will alter the equations for those super-early moments.

That doesn’t stop people from ignoring the mathematical failure and postulating what did happen. Indeed, that is the way physics progresses. But the honest answer is that for the very early time, when the universe was no more than a Planck length in size, our current physics theory tells us nothing.

My own favorite speculation is the one you mention in your question, that time did not exist prior to the Big Bang. But if time didn’t exist, then what does it mean for time to “be created”. That requires movement of time. So many physicists think that when the proper new physics is added it, we will find that the universe existed before the Big Bang, and that what we are seeing is some sort of a “bounce”. But we don’t know the true physics for such super dense material, so we can’t really say much more.

As I said, I enjoy more the idea that time just started at the Big Bang. But this is not physics; it is playful speculation.

Richard Muller, Prof Physics, UCBerkeley, auth “Now -The Physics of Time- (to be published 2016)

Source

via ScitechPress.org