Is Dark Matter made up of Massive Quark Objects?
  We suggest that dark matter is made up of massive quark objects that have survived from the Big Bang, representing the ground state of ``baryonic'' matter. Hence, there was no overall phase transition of the original quark matter, but only a split-up into smaller objects. We speculate that normal hadronic matter comes about through enforced phase transitions when such objects merge or collide, which also gives rise to the cosmic gamma-ray bursts. 
S. Fredriksson, D. Enstrom, J. Hansson, S. Ekelin and A. Nicolaidis