As a species, it is the nature of humans to seek understanding and learn why things are the way there are. The desire to learn how things work and why things are as they have fueled an expansion of thought and a greater perspective of the universal questions, the oldest being how the universe came into being. As humans have evolved and grown wiser, the theories of how the universe came into being have evolved as well.
God And Religion
Before the inquisitive nature of thought led to the development of science, matters pertaining to the explanation of the natural world and the universe at large were defined by religion. God, in all of his/her grandeur, was the source behind the formation of the universe, the creation of everything in it, the reason why things happened the way they did.
The Big Bang
As time moved forward and the intellect of man expanded, the birth of science occurred. Physics was established as a means to postulate theories about the nature of things in which they were able to be tested to determine if they were true or false. The brilliant work of physicists such as Einstein led to the most popular theory of how the universe was created, that being the Big Bang Theory. In this theory, the universe formed from the explosion and expansion of a very dense, extremely high-temperature state. Within this model, the explanation of many of the precepts of modern physics are defined.
Because humanity is a quizzical species, it is natural to question the norms and established thought. This has given rise to opposing views and explanations of how the universe was formed. The new universe theory, for example, is based on the theory of Gravitational Expansion which defined gravity as the opposite of what Einstein’s Theory of Relativity stated it to be.
There is no definite explanation of how the universe began. What is definite is that humans will continue to search for the answer to this age-old question. During the pursuit, new theories are sure to arise as old ones are reexamined and tested again.