TheSpanishImposition

Are there theories on how these dark matter free galaxies came to exist? I mean, did they form that way, or did they lose their dark matter somehow like in a collision where the normal matter got left behind?

How are we so sure that dark matter is matter and not something like primordial eddies/puckers/dimples/tangles in the fabric of spacetime? We only know it's there because of how it warps spacetime, so what if it's just a topological feature of spacetime. <kook> And what if these tangled puckers are occasionally popping free, releasing their potential energy, and what if that's the source of dark energy? </kook>

Why don't you go fuck yourself?