Since the beginning of human civilization, people have always questioned the origins of their existence and the creation of the universe. "Where did it all come from?" "How was it created?" These are the questions that plagued ancient societies and are those which still puzzle scientists today. Cosmology, the study of the large scale structure and evolution of the universe, is the branch of science which has evolved from these questions. Within in this field of study, the Big Bang theory has become the most prevalent theory, because the majority of evidence from a variety of different investigations make it extremely likely that something like the Big Bang occurred.
The Big Bang theory is a model of the universe in which space-time begins with an initial singularity and subsequently expands. Since its initial introduction, much evidence has helped to strengthen its case, and other theories have been added to it. In short, the Big Bang theory is one which incorporates other theories in its attempt to explain the evolution of the universe.
Though there is an abundance of supportative evidence for the Big Bang theory, there are still questions which remain unanswered. Other theories that attempt to explain the origin of the universe exist, but the Big Bang theory has become the standard model.
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