The big bang starts about 14 billon years ago. The Univers was like a very small bubble.It was very hot and very dense. Then it exploded and the Univers about one second it went form a very small thing to a larger one than a galaxy.
When the univers it created, it was sold out and the temperature dropped. Energy became two types of particles: antimatter and matter. More stable particles called protons and neutrons began to form when the Universe had a second.
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