Not a physicist either. But from what I understand from Lawrence Kraus's lecture 'A universe from nothing' is they found light bending(A phenomenon similar to g

Not a physicist either. But from what I understand from Lawrence Kraus's lecture 'A universe from nothing' is they found light bending(A phenomenon similar to gravitational lensing) around a massive start cluster, the amount observed and the mass in that area was insufficient to explain how that kind of phenomenon was possible. When looked at from the perspective of Gravitational lensing[A phenomenon that bends light] there is some kind of aether 2.0 with a mass that causes the gravitational lensing effect. Personally I think this is the wrong approach to work with this. We know that a cause c1, was the result of phenomenon p1. We are assuming another cause c2, which is very similar to c1 MUST also be happening due to p1. It might very well be there is a phenomenon p2 responsible for c2. We seem to be trying to state cause(dark matter) in terms of its side effect(phenomenon similar to gravitational lensing) without understanding what it actually is.