What are the biggest problems of "push" / kinetic gravity theory? Please, don't crucify me! I saw a couple of threads here closed for bringing this up, which I don't really understand why. Shouldn't we always doubt? I understand that it is old and common and amateurish idea in physics, but that fact alone might have it's own weight (no pun intended, lol). So I did my best, from Wikipedia, Feynmans lectures (make sure to see them all on Tuva, they're very inspirational - thanks Gates), searched this forum and looked up some books (http://en.wikisource.org/wiki/Kinetic_Theories_of_Gravitation). This being really old and around idea, it has many documented reasoning, but I cannot really find any relatively new papers on the subject, presumable because it's was killed centuries ago and it is suppose to stay dead. I am not sure If I should get recent Push Gravity from Amazon, or is it just some publicist novel. A lot of things were discovered in particle physics last century, and I just want to find out if someone took the effort of making sure that it is still all impossible theory. I had two related threads here, one about all the "stuff" that can be found in empty space, and another related to "stuff" that is absorbed by matter (e.g. Sun), both of which ended very informative for me. So can anybody tell me, in order of importance, in laymen’s reasoning, what are the biggest problems that are making "push gravity" impossible? Drag? Heat? Isotropy? Particles?