Professor H. L. Bray         Research                 General Relativity, Einstein's theory of gravity that predicts black holes, the big bang, and the accelerating expansion of the universe
Special Relativity and General Relativity explained in an hour, using these
slides.
Flatly Foliated Relativity: An elliptic theory of gravity, 2/3 of the way between Special Relativity and General Relativity, discovered in 2016 by Professor Bray