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No need to single anybody out, I don't think.
The General Theory of Relativity was first published by [[Albert Einstein]] in 1916.
General Relativity, like [[Quantum Mechanics]] (the other of the two theories comprising "modern physics") both have reputations for being notoriously complicated and difficult to understand. In fact, in the early decades of the 20<sup>th</sup> century, General Relativity had a sort of cult status in this regard. General Relativity and Quantum Mechanics are both advanced college-level and postgraduate level topics. Conservapedia No encyclopedia article can't really explain either of them fully. But, in the article below, we will attempt to give a rough outline of the General Relativistic formulation of gravity.
The general theory of relativity is a ''metric theory,'' sometimes also called a ''geometric theory.'' Metric theories describe physical phenomena in terms of [[differential geometry]]. This stands in contrast to Isaac Newton's [[Law of Universal Gravitation|law of universal gravitation]], which described gravity in terms of a [[vector field]]. In the case of general relativity, the theory relates ''stress-energy'' — an extension of the concept of [[mass]] — and the [[curvature]] of [[spacetime]]. In the words of physicist John Wheeler, "Space tells matter how to move, matter tells space how to curve."<ref>Misner, Thorne & Wheeler. ''Gravitation.'' (1973)</ref>
