Can anyone explain the BIG BANG THEORY?
When we look at the universe we see that on a large scale it is expanding. Running the clock backwards we see that all the matter in the universe would have been at a point 13.7 billion years ago. Using physics and a lot of maths it was determined that if the universe did start from a point that expanded rapidly then we should see the radiation that was trapped and escaped 300,000 years after the big bang, red shifted to a black body temperature of 2.7 degrees. This is the 3 degree cosmic microwave background and it is almost perfectly uniform in ever direction. So what we are saying is that everything in the universe including time and space started at this point. We cannot say what was before because there was NO before.
