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presents: What Is The Big Bang Theory. Learn how the Big Bang gave life to earth. Find out about alternate theories of how the universe began. The Big Bang Theory is an explanation that shows the origin of the stars, planets, galaxies and the Universe as a whole. Scientists believe that the Big bang was the very beginning of the creation of this Universe. Scientists state that the Big Bang occurred about billion years ago. Our universe is just a small part of the world. There are many other universes that exist. We live in a Multiverse. This idea came from the Big bang which might have given rise to bubble like structures which expanded in their own time. Astronomer Edwin Hubble, in the 1920s, discovered that the universe is not static. It is expanding and contracting continuously. There is a dark energy that is making the Universe expand and accelerate at a larger rate than it did many years ago. There are many galaxies apart from our Milky Way that are moving further and furth
