Where was dark matter in the early universe?

For stars at a galaxy’s edges to be moving at the same speed as stars near a galaxy’s center suggested to astronomers in the 1970s that what we thought was a galaxy’s edge was not the edge, after all. That’s why it’s so surprising that new observations with the European Southern Observatory (ESO) Very Large Telescope in Chile indicate massive star-forming disk galaxies in the early universe were less influenced by dark matter than galaxies today. The six galaxies mapped in this study were among a larger sample of 100 distant, star-forming [disk galaxies] imaged with the KMOS and SINFONI instruments at ESO’s Very Large Telescope at the Paranal Observatory in Chile … In addition, two further studies of 240 star forming [disk galaxies] also support these findings.