Amongst many religions, a popular opinion exist about how the world started, and this is the fact that the universe was created by “God”.
The problem scientists have believing such a claim is that it cannot be backed with scientific proofs, thus leading them to refute the idea of a supreme God creating the universe. Don’t be surprised by this because all the scientific principles the world around us work on have been tested and proven scientifically. Now to the question of the how scientist claim the universe started;
THE BIG BANG THEORY
Today, the consensus among scientists and astronomers is that the Universe as we know it, was created in a massive explosion that not only created the majority of matter, but the physical laws that govern our cosmos, At this time, all matter was compacted into a very small ball with infinite density and intense heat called a Singularity. Suddenly, the Singularity began expanding and cooling leading up into the universe as we know it today. This time period is what is know as the big bang. The time line when the big bang happened was about 13.8 billions years ago and still counting.
After about 379,000 years, electrons combined with these nuclei to form atoms (again, mostly hydrogen), and atoms combined to form molecules, molecules combine to form element, and elements combining further into the future lead to the creation of life and the beautiful world around us.
Also following the big bang timeline it is estimated that the solar system, the Sun and the rest of the planet in the solar system formed from a giant, rotating cloud of gas and dust called a solar nebula about 4.5 billion years ago.
The oldest known fossils of life was formed has existed for approximately 3.5 billion years.
To scientist this was how the universe in its entirety was created and although the questions still linger, what caused the big bang and what existed before the big bang, till today these questions have not still been answered by scientist. Was it God that started the big bang or is it something else scientist have to find out by themselves.