The Speed of Gravity

Isaac Newton is best known for his theory of gravity. And yet, the great scientist also insisted: "the cause of gravity is what I do not pretend to know.” In other words, notions like gravity, and force in general, are deeply mysterious phenomena. In this episode of the Sheldrake-Vernon Dialogues, Rupert Sheldrake and Mark Vernon ask just what gravity might be. The conversation begins with a feature of gravity that is typically overlooked by physicists, namely that gravity has a speed. Accord...