I'm looking at this thread, https://www.physicsforums.com/showthread.php?t=403472 Dark Matter, On the Ropes? If there is no dark matter, could the neutralino of MSSM, SUSY and string theory, or the axion of GUT's exist? IF there is no dark matter, doesn't this imply there are no neutralinos or other SUSY-partners, falsifying MSSM, SUSY and MSSM, and possibly higher dimensional kaluza-klein tower modes? If there is no dark matter, does this imply only SM particles exist (i.e only SM particles can be experimentally detected, particles that cannot be detected by any experiment could conceivably exist in the equally undetectable multiverse)? Dark matter would not prove MSSM since they could be say particles of a yet unknown theory, or perhaps microblack holes are stable, or geons, but no dark matter at all wouldn't that falsify string/MSSM/SUSY/GUT?