??? Ronald June 20, 2011 at 7:40 now that you are on it, see also my latest comment under the recent article about Woodward and Mach (Progress Toward the Dream of Space Drives and Stargates): maybe it would be a nice idea to have an article giving an overview with comparisons/similarities/differences plus updates of ongoing research with regard to anti-gravity and the like, i.e. Heim???s theory, T