a dark brown in color with dark matter Warm dark matter Primordial black holes Axino Axion Dark photon Preon Sterile neutrino SIMP WIMP WISP Cuspy halo problem Dark fluid Components Dark matter Antimatter String-net liquid Other states Magnetically ordered □ Ferromagnet □ Antiferromagnet □ Ferrimagnet Quantum spin liquid Exotic matter Related Galaxy formation and evolution Illustris project Observational cosmology Planck