Starting from 25 h^-1 Mpc across we see the column density of Neutral Hydrogen - HI (as detectable by radio telescopes such as ASKAP).
The broad filaments of low density HI (in purple) is the Cosmic Web and traces the underlying Dark Matter distribution. At the nodes of theweb are cluster of galaxies, one of which we zoom in on.
The final galaxy we can see is of a galaxy about the size of our Milky Way (10^12 Msol) but when the Universe was only a few billion years old, making it truly a monster galaxy at this point in time. The blobs of cold material (green) are falling into the central disk, which is of very high density (seen in red). Galaxy formation at this early time was an active and dynamically complex process.

The simulation zooms out again showing that this galaxy is but a tiny part of the much larger picture.

View the version without labels here: vimeo.com/22379055

Dr Alan Duffy, ICRAR