Physics and astronomy proceed by way of experiments. The astronomers have done their experiments successfully and determined the amount of Dark Matter. The physicists have not yet figured out how to detect the nature of dark matter. Once they do, the theories will change accordingly. It just that theoreticians are proposing a myraid of theories, myself included, in the hope that one of them will be right.

But only a handful of these theorists have the influence, me excluded, to determine experiment design. So far, none of the parameter ranges explored, as deduced by theory, have been successful in detection. But the ranges are very narrow. These theorists of course conclude that dark matter cannot exist if their theory is not true.

Richard