We really don’t know with much certainty that the universe began with the Big Bang. For instance, if “eternal inflation” is right then what we call the Big Bang was the beginning of “our” universe but not of the universe.
We really don’t know with much certainty that the universe began with the Big Bang. For instance, if “eternal inflation” is right then what we call the Big Bang was the beginning of “our” universe but not of the universe.