I'm not a physicist and barely understand some of the things I'm reading in this thread, but your question reminded me that I did hear about a relativistic MOND

I'm not a physicist and barely understand some of the things I'm reading in this thread, but your question reminded me that I did hear about a relativistic MOND a few months back (called TeVeS): https://en.wikipedia.org/wiki/Tensor%E2%80%93vector%E2%80%93scalar_gravity https://en.wikipedia.org/wiki/Tensor%E2%80%93vector%E2%80%93...