In this episode Jim and Randy talk about how to evaluate alternative gravity theories. What sort of things do we want them to explain, what experiments do they have to predict, and what theoretical requirements do they have to meet. This is in some ways a continuation of Episode 9 - f(R) Theories of Gravity, but the discussion is relevant to all attempts to amend gravitational theory.Show notes: http://frontiers.physicsfm.com/10In the program, Randy talks about the outline I sent him. I put that up on the Physics Frontiers Blog.