The newly proposed form of dark matter might instead be entirely isolated in its interactions, with the bulk of dark matter not even experiencing indirect effects of the newly introduced dark force.
Why does she assume that there is only one type of dark matter. There might be several distinct sets of dark matter, each as different from each other as the ordinary matter is from what Dr. Randall has said that dark matter is -- dark matter, darker matter and darkest matter, each with their own set of particles and forces, each tied together by gravity.
