The atheist-physicist, Lawrence Krauss, believes he has explained the origin and explanation of the universe in his book, A Universe from Nothing: Why There Is Something Rather than Nothing. Not everyone, however, agrees with his conclusion. George Ellis is a world-renowned scientist and expert on the Big Bang theory; he is also a devout Christian. Ellis has commented on Krauss’ book and the following is an excerpt from those comments.
[Krauss] is presenting untested speculative theories of how things came into existence out of a pre-existing complex of entities, including variational principles, quantum field theory, specific symmetry groups, a bubbling vacuum, all the components of the standard model of particle physics, and so on. He does not explain in what way these entities could have pre-existed the coming into being of the universe, why they should have existed at all, or why they should have had the form they did. And he gives no experimental or observational process whereby we could test these vivid speculations of the supposed universe-generation mechanism. How indeed can you test what existed before the universe existed? You can’t.
Thus what he is presenting is not tested science. It’s a philosophical speculation, which he apparently believes is so compelling he does not have to give any specification of evidence that would confirm it is true. Well, you can’t get any evidence about what existed before space and time came into being. Above all he believes that these mathematically based speculations solve thousand year old philosophical conundrums, without seriously engaging those philosophical issues. The belief that all of reality can be fully comprehended in terms of physics and the equations of physics is a fantasy.
John Horgan, “Physicist George Ellis Knocks Physicists for Knocking Philosophy, Falsification, Free Will,” Scientific American Blog Network, July 22, 2014, https://blogs.scientificamerican.com/cross-check/physicist-george-ellis-knocks-physicists-for-knocking-philosophy-falsification-free-will/.