I know that Einstein dedicated the end of his life working on this topic. Do anybody knows what exactly did his theory was about, and if it is connected somehow with modern unified therories?
Jake said:I've been looking for more information on this too but have found very little. Only general things like how mass is merely a field of very hight density and energy less high density. I guess. Anyway how do we get "5th ed. of the Principle of Relativity"?