This text makes the promotion of an article by B. Dobrescu and D. Lincoln from June 2015, written for the Scientific American journal. Please cite your references, this is a matter of being fair to the original authors. And please also cite the sources for the pictures...
Finally, let's go back to physics. You do mention several dark matter experiments that actually have results now (LUX for instance). It may be good to update your post to describe that, which will make it slightly up-to-date with respect to current state-of-the-art.
RE: The theory of dark matter