A 73-quasar object called the "large quasar group" has been found that is 4 billion light years long. It was found with a 3D min-spanning-tree algorithm on a dataset of 105783 quasars. This is allegedly the largest thing ever seen. Quasars tend to clump together in organized-looking structures, not "randomly distributed." This seems a good deal larger than "galaxy superclusters." Is this object for real, or merely what would have been expected to happen by examining enough random points? They argue the former, but I find their argument unclear and hence unconvincing. They think this object has 40% greater "local density" than it would have had with uniform universe. Roger G. Clowes, Kathryn A. Harris, Srinivasan Raghunathan, Luis E. Campusano, Ilona K. S"ochting And Matthew J. Graham: A structure in the early Universe at z~1.3 that exceeds the homogeneity scale of the R-W concordance cosmology, Monthly Notices of the Royal Astronomical Society (11 January 2013) http://mnras.oxfordjournals.org/content/early/2013/01/07/mnras.sts497 Picture: http://mnras.oxfordjournals.org/content/early/2013/01/07/mnras.sts497/F1.lar...