Where does everything come from? How did we get to where we are now? Where does the human being fit in? Where are things going? These are the questions that the origin stories of various cultures have been asking for thousands of years. Big History is an attempt to examine history through science from the Big Bang to the present. In this project we focus on the origin of the universe: the Big Bang theory. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an Original Essay Discoveries in astronomy and physics have shown reasonable doubt that our universe had a beginning. It all began with an explosion known as the Big Bang. Astronomically, the Big Bang is a theory that the universe originated billions of years ago in an explosion from a single point of nearly infinite energy density. In its simplest form, the Big Bang is a scientific theory about how the universe began and then created the stars and galaxies we see today. As time passes, the universe grows and the temperature decreases. Cosmology is the study of how the universe began and its development. According to the theory, the universe began as very hot and dense superforces that are the combination of the four fundamental forces without stars, shape or anything about 13.7 billion years ago. The singularity is an area that challenges our current understanding of physics. A singularity is defined as a point at which the predictable nature of physics breaks down because the curvature predicted by general relativity at that point is infinite. Black holes are thought to exist at the center. Scientists who study cosmology agree that the theory matches what they have observed so far. Other scientists who have contributed to research on the expanding universe include Vesto Slipher, Albert Einstein, Alexander Friedmann, and Edwin Hubble. There are three strong pieces of evidence to support the Big Bang theory. They include the existence of microwave background radiation, the expansion of the universe also known as the red shift leading to Hubble's law, and the relative abundance of very light elements such as hydrogen and helium. Stars do not stay the same, but change as they age. Please note: this is just an example. Get a custom article from our expert writers now. Get a custom essay Before the discovery of the Big Bang it can be said that time had no Sense. If the Big Bang was the beginning of time, then no universe would exist before the Big Bang, since it could not exist before if there was no time! Meanwhile, others argue that the Big Bang was not the beginning of time 13.8 billion years ago. On the contrary, some of them believe that a completely different universe existed before the Big Bang and it may be very different from the universe we know today..