Largest cosmic structures 'too big' for theories - space - 21 June 2011 - New Scientist

Largest cosmic structures 'too big' for theories: Shaun Thomas of University College London (UCL), and colleagues have found aggregations of galaxies stretching for more than 3 billion light years. The hyperclusters are not very sharply defined, with only a couple of per cent variation in density from place to place, but even that density contrast is twice what theory predicts.