There are several main pieces of evidence<span> that support the </span>Big Bang<span> theory. One is the fact that the universe is expanding, proven with something </span>called<span>red shift. The second is something </span>called<span> cosmic microwave background radiation. The third is the abundance of different elements in the universe.</span>
One of the fact that the universe is expanding proven with something called red shift . second fact is something called cosmic microwave background radiation .the third is the abundance of different elements in the universe
