The biggest mystery in the universe, is how the universe itself was created, or came into being. Is there a definitive answer to the question, the answer has to be a resounding 'No!'. A definitive answer is impossible, all than anyone can do is hypothesise on what may have happened, a hypothesis that will fit with current theory rather than scientific facts.
Why will cosmology never give us an
answer to how we arrived here? That answer is at least an easy one
to answer. Firstly the event was not witnessed, secondly we cannot
recreate the conditions that existed immediately before the Big Bang,
ever if we could be sure what those conditions were. Thirdly it is
likely that nothing existed before the Big Bang, no space and no
time, so we cannot even imagine those conditions, let alone recreate
Up until quite recently it was considered that the universe had always been here, that it had neither a beginning nor an end. It was Edwin Hubble (November 20, 1889 – September 28, 1953) who first confirmed the fact that the universe had a beginning, through his realisation that the universe was expanding. If it was expanding then at some point in the past, there had to be a point where it all started, a reasonable assumption, and that event horizon may well have been the expansion of a super-dense particle. 'The Big Bang' (coined by the English astrophysicist Fred Hoyle in 1950) is very misleading, as it is generally agreed that the event was an expansion rather than an explosion, so from now on we will refer to it as the 'Event Horizon' or 'Expansion'.
There are two big issues with the current theory, firstly where did that super-dense particle (SDP) come from and secondly what made it expand into the proto-universe. Whatever one believes scientifically or religiously, everything in the universe is subjected to the physical laws of the universe, that every action has a reaction, and every reaction needs an action. Applying this, something needed to apply the action that caused the the SDP to appear and then to expand. The answer, says physicist Sean Carroll, (senior research associate in the Department of Physics at the California Institute of Technology is, “We just don’t know.” Carroll says. “We are both blessed and cursed. It’s a golden age, but the problem is that the model we have of the universe makes no sense.” Carroll also says that the early universe was ordered (smooth) during that expansion, he says, "The WMAP (Wilkinson Microwave Anisotropy Probe) snapshot of how the early universe looked shows it to be hot, dense and smooth [low entropy] over a wide region of space,” said Carroll. “We don’t understand why that is the case. Our universe just doesn’t look natural.”
The opposite of entropy is 'order', so here's the problem, how can an event such as this be ordered, Sean Carroll, one of the age's best cosmologists, says that it does not look natural, well maybe that is because it is supernatural.