Comment Re:WTF (Score 1) 247
Conservation of angular momentum would likely turn any small particles into an accretion disc - which is sort of like a a ring around the earth that they are suggesting. If dark matter only interacts through gravity, this would actually be strengthened as there would be no collisions to knock this matter out of the plane.
Rings actually do make a lot of sense. Why else do you think all the planets are pretty much on the same plane, why are so many galazies that lovely spiral shape? Why are the asteroid belts in our solar system rings?