(August 30, 2013 at 5:28 pm)Mister Agenda Wrote: The problem with Modfied Newtonian Dynamics, the idea that there is a break in the intensity of gravity at very low accelerations, is that if it works, we still don't know why it works. It kind of resolves the Dark Matter issue, though.
That it would, but as far as I'm aware it has no answer for accelerated expansion ("dark energy"). In addition, the theory swaps one unknown for another, as you imply. I'm staying on the fence for now.