Ever noticed how The Big Bang Theory (the show) doesn’t actually talk about the Big Bang?

We are bounded in a nutshell of Infinite Space: Week 8: Free Form #9: Ever noticed how The Big Bang Theory (the show) doesn’t actually talk about the Big Bang?

The Big Bang theory presents our modern standard cosmological model. It includes in the description of a Universe which began in the form of a quantum state of such high energy and density that the Fundamental Forces of the Universe, Gravitational, Electromagnetic, and the Strong and Weak Nuclear Forces, had not separated. This also corresponds to the fact we still have no physical description for the universe before gravity had separated from the other three, a conundrum which continues to perplex astronomers and physicists alike, which could, in the future, have a solution when considering the theories on quantum gravity (but more on this later). Anyways, the Big Bang Theory describes how the universe expanded into a flat universe, first off a radiative driving force of expansion, followed by baryonic matter, and now approaching the epoch where the expansion is controlled by the vacuum energy, Dark Energy (queue deeper voice and lightning/thunder in the background) (more information on the equations which describe these expansion states can be found on: http://ay16-rodrigocordova.blogspot.com/2015/11/cosmology-101-part-2.html ). The universe expanded off initial gravitational and density perturbations/fluctuations to cause a complex web of baryonic gravitational systems, all held in line (and drawn together) by the only source of gravity strong enough to hold the forces in play, the mysterious Dark Matter.

However, just what caused the Big Bang, or rather, what are the driving mechanisms: my guess is as good as yours, with some initial condition we are able to construe. These are the first moments of the universe where quantum fluctuations determined the universe, meaning there were unpredictable changes and shifts in the nature of the pre-modern physics understandable era of the universe, all related to how the Universe began with a Singularity of Space-Time, and expanded from there on from the photonic and later radiative and other driving mechanisms. But, these definitions created a problem in the Big Bang, a perception of the early universe which did not line up with the observations of the Early Universe made on the Cosmic Microwave Background and other early sources. These are the Horizon, Magnetic Monopole, and Flatness Problems, predictions and observations made of the Early Universe and its effect in contemporary observations which contradict each other, or otherwise prove highly unlikely in the way they resulted nowadays (more on this in a bit). Regardless of these problems, and their proposed solutions, the Big Bang Theory represents the most robust theory to describe the beginning of the universe, adding onto decades of research to develop a model explain the expanding universe we continue to live in.  

                         (Disclaimer: Although the video represents the initial sound waves emanating form the Big Bang, the noise is quite annoying)

References: 

https://www.youtube.com/watch?v=WksTp06Go2c

Carroll, B. W., & Ostlie, D. A. (2007). An Introduction to Modern Astrophysics. San Francisco: Pearson: Addison Wesley.