A twin of the cosmic filament observed in the MUDF as seen in a supercomputer simulation describing the large-scale distribution of gas in the Universe. The gas flowing within the cosmic web, feeding galaxy formation at filament intersections, is shown in purple. Credit: Davide Tornotti/University of Milano-Bicocca/MPA Scientists have produced the clearest view ever of part of the cosmic web, the enormous hidden network of matter that stretches across the Universe and connects galaxies together.