If you go to rxiverse, under Physics, 3rd one down click on Relativity and Cosmology, then scroll down to paper 151 there is an interesting paper about a plausible explanation of the causation of Gravity. Also, if you scroll further down to papers 146 and 122 there are 2 additional papers by the same author.
Interesting reads if I do say so myself. But I might be biased in my opinion.