If something is impossible, according to all that is known from experimental, testable,repeatable science, why should it be possible in any universe ? , however much multiverse you imagine. The odds of that spider taking the same route up your wall, or that cloud with that same configuration occurring again are infinitely more favourable than something from absolutely nothing. Last I heard, that is what atheists believe, Christians however, believe in an eternal, uncreated God. That of course, cannot be proved, but the assertion that there is not a scrap of evidence is nothing more than bluff and bluster. What you mean is, is that there will never be enough evidence to satisfy you. And what you believe , ie the general theory of evolution, equates to a secular miracle, since you can offer no experimental observational, repeatable science to validate that belief. Christians however can point to countless evidences of design, and numerous holes in evolutionary dogma.