Intriguing idea, but what if Dark Matter and Dark Energy are opposite sides of the same coin? More of a Dark Fluid that permeates all of space and behaves differently at different scales and depending on how large and how much mass is involved. Not my idea, but a few scientists, who think we will find no WIMPS or other exotic particles, because this Dark Fluid or Ether is a property related to Gravity or is solely dependent on Gravity's influence or lack thereof. Kind of like zero-point energy created by vacuum between galaxy clusters pushing them faster apart, somehow. A lot of filling in, this new theory, but having one transmutable animal to verify is a lot better than two, in the form of Energy and Matter (Dark). Embarrassing for cosmology to talk about two things we have NO idea about. One is much easier. Kind of like Modified Theory of Gravity postulated a few years back. Read the Space.com article. Very cool, if you,(and even if you don't) ask me. <div class="Discussion_UserSignature"> We must progress and expand, or we will stagnate and die. </div>