Board Thread:Fun and Games/@comment-27264399-20151123211021/@comment-27723099-20151125173109

The Big Bang theory never said there was nothing before the bang. There are rough calculations how much energy there was behind the Big Bang, and due to the law of conservation of energy, the same energy must still exist in the whole universe today, and it must have been there before the Big Bang. Remember: Matter is just a special form of energy, and the energy concentration that caused the Big Bang was too dense to be in the form of matter, so you could say that there was no matter before the Big Bang (and a long time after it).