> Suppose that dark matter really does exist, and we can't ascertain that fact with any certainty. What do you want Physics as a whole to do about that? Be mor

> Suppose that dark matter really does exist, and we can't ascertain that fact with any certainty. What do you want Physics as a whole to do about that? Be more bold in exploring alternative gravity theories and conceiving of tests we can perform to check how gravity behaves in regimes that are not yet well tested.