This is a great video! It gives you an idea of the extent to which physicists go in order to try to understand the state of being of the Universe. I believe that the search is unending.
The Standard Model provides a theory that, so far, has been able to accurately describe how all the physical forces in nature known to man, except for gravity, are related to each other. Over the years, the Standard Model has been successful in predicting many physical phenomenon that we are finding in the Universe, most recently, the presence of the Higgs Boson. The article below describes all of this in relatively simple terms.