General Relativity.

with all due respect, the issue is gravity. and we've been over this before.the point is not that there is {no evidence at all}, but that the evidence we have is not sufficient to say that current theory covers the observed data ... and thus that we have a cohesive theory for how gravity works. we have anomalies. "dark matter" is not an actually observed piece of evidence but a hypothetical explanation for an observed large scale anomaly, where the current theory of gravity does not work.and we have some right here in the solar system that are similar in effect to what has been observed at large galactic dimensions, but the explanations (hypothesis) for one are inconsistent with the explanations (hypothesis) for the other.we also have predictions based on current theory that have not been observed, whether gravitons or gravity waves is irrelevant.to me that adds up to something is missing.now who plays tag-team first?

I have never claimed to have a degree in physics nor to know more than just enough to be dangerous. I don't claim to be an expert, just a skeptic.