Does anyone else ever wonder about what there was before the big bang? It kind of seems ominous to me, because we don’t actually know what there was before it. People always talk about how we’re replaceable and meaningless in the grand scheme of the universe, but how do we know that the universe itself isn’t replaceable, that one day the big bang will go off again and our universe will be destroyed, most likely replaced with a new one? Are there any remnants of things before the big bang in our universe?