Meissner et al just posted a paper where they see those circles in the high res. microwave sky of Planck. Who knows if this is real, or what it would mean if it were confirmed? Meissner has a followup paper in preparation with Penrose and others. Either way I think it's pretty interesting. check out their CMB maps with the circles overlay. The circles seem to be clustered, not randomly distributed. And there is a qualitative difference between N and S galactic hemispheres. http://arxiv.org/abs/1307.5737 Structures in the Planck map of the CMB Daniel An, Krzysztof A. Meissner, Pawel Nurowski (Submitted on 22 Jul 2013) We present the results of the quest for ring-type structures on the maps observed by the Planck satellite. BTW I have the highest respect for Kris Meissner, he is an associate of Jerzy Lewandowski and of Hermann Nicolai and he impresses me as the kind of person who would not fool himself. So make of it what you want---I take the paper seriously. It could be wrong, but IMHO it is not to be immediately dismissed.