Galaxies Web

British and Spanish astronomers have obtained the first observational evidence that galaxies are oriented not randomly, but in a pattern that accords with the web of dark matter that surrounds them. Specifically, the researchers found a surplus of galaxies oriented perpendicularly to the filaments of dark matter making up this cosmic web--exactly what theory predicted.
A paper detailing the findings appears in the April 1 Astrophysical Journal Letters.

From Scientific American