That is interesting. Being able to prove Einstein on the grand scale and show that the dark matter or vacuum of space is actually have an effect of the galaxies and other developing energies by slowing growth down. I am sure we will learn more about this in the near future.
We know so little that caused the universe to expand from its original; capacity to start. Let alone where all this could have generated from to begin with. I think this shows us there is an energy at play which so far has escaped our understanding in the scientific community.