There is probably a really obvious disproof of this, but I thought of what might be an interesting concept to explore in a sci-fi story. When they mentioned th

There is probably a really obvious disproof of this, but I thought of what might be an interesting concept to explore in a sci-fi story. When they mentioned that there could be a whole other class of particles rather than one type of dark matter, it made me think what if dark matter is just an adjacent universe and for whatever reason gravity can interact between universes. So it would make sense if galaxies in neighbor universes tended towards places in our universe with high gravity, i.e. our galaxies. Especially if both universes started at around the same time. But then I guess that would probably mess up orbits of smaller things. Although space is big so maybe not. Just a thought.