Big Bang Theory... the truth

What happened before the big bang, evidence of the big bang theory, what caused the big bang, big bang theory of evolution are some of the questions asked on the Internet today.

What do we mean when we talk of big bang theory? It is in the last 30 years or so that scientists across the world accepted and confirmed the existence of the big bang theory. It has more or less been proved that the evolution of the Cosmos occurred with a big bang. There is no further denial on this fact of big bang theory.