[henkster]

I strongly suspect “Dark Matter” is a way to patch a big hole in a flawed underlying theory. Kind of how the ancient scientists had to come up with wheels within wheels to maintain a theory of a geocentric universe.

[Mount Athos]

Yeah

Galaxies should be flying apart far more than they are if our understanding of gravity was correct.

To make the equations work they infer “dark matter” as a fudging coefficient.

But maybe there is no dark matter and our equations and understanding of gravity are wrong in some way.

or you can invent parallel universes with leaking gravity to make the equations work.