No need for dark matter?
I read this article last month; the science behind an EmDrive works for galaxies thus resulting in no need for Dark Matter.
http://www.ibtimes.co.uk/emdrive-uk-scientist-claims-new-physics-explains-galaxy-rotation-theoretical-space-propulsion-1606367
Maybe it's nothing, maybe it's everything. What's reassuring at least is the two sides are trying to prove themselves rather than use the standard God practice. "The lord works in mysterious ways. Now shut up and give me your money."