MATTER AT SCALE IS DIFFERENT. “General relativity (GR) has made remarkable achievements in resolving various hidden puzzles of the cosmos but it is not adequate to inspect the universe at large scales. In this regard, alternative theories to GR are identified as the most effective approaches to deal with the stimulating mysteries such as dark matter and current accelerated cosmic expansion.”
https://www.sciencedirect.com/science/article/pii/S0577907319309773