The Millennium Simulation, also known as the Millennium Run, is a giant simulation of the whole known Universe. It clearly shows the distribution of clusters and super-clusters of galaxies as well as giant voids. It is the largest and most precise model of the Universe ever conceived. The simulation was run in 2005 by the Virgo Consortium, an international group of astrophysicists from Germany, the United Kingdom, Canada, Japan and the United States.
One thing that really strikes you as you watch this video is how those galactic clusters are arranged in a pattern that looks like the neurons in our brains. It’s interesting that the Universe takes this form in its grandest scale.