What do you think about the theories that have been postulated regarding a possible second universe interacting with ours if it exists? I remember listening to, I think, a NDT podcast on how a 3D object placed onto a 2D plane would be visible on several points along the 2D plane and how a similar thing might occur with two universes if such a thing exists. So we may not directly observe a second universe, but instead we could see it's effects on our universe. And maybe we could eventually predict when and where those effects could be observed. An infinite set doesn't necessarily mean that all possible configurations are used right? That question really wigs me out sometimes. Maybe things exist simply because they can? The energy in the universe is neither created it destroyed. Maybe it's always existed in this infinite cycle where pure energy is compressed into this little ball and explodes outwards creating matter in the big bang. The universe then expands until all energy has been turned into matter and it can't expand anymore and there's the heat death of the universe. Maybe once everything hits this universal limit of expansion and energy expenditure, there's an opposite reaction to the big bang called the big collapse or something. That collapse will of course condense everything back into that infinitely small point until it reaches a critical mass and explodes.