Galaxies form within the complex network of massive filamentary dark matter structures. The region shown is a billion light years across.
Paper at ArXirv.org : Before Stars, Dark Matter Haloes were First Objects in the Early Universe
Source (Institute for Theoretical Physics, University of Zürich)

Galaxies form within the complex network of massive filamentary dark matter structures. The region shown is a billion light years across.

Paper at ArXirv.org : Before Stars, Dark Matter Haloes were First Objects in the Early Universe

Source (Institute for Theoretical Physics, University of Zürich)