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A new analysis of the CMB, using WMAP data, supports earlier indications ofnon-Gaussian features of concentric circles of low temperature variance.Conformal cyclic cosmology (CCC) predicts such features from supermassiveblack-hole encounters in an aeon preceding our Big Bang. The significance ofindividual low-variance circles in the true data has been disputed; yet arecent independent analysis has confirmed CCC's expectation that CMB circleshave a non-Gaussian temperature distribution. Here we examine concentric setsof low-variance circular rings in the WMAP data, finding a highly non-isotropicdistribution. A new "sky-twist" procedure, directly analysing WMAP data,without appeal to simulations, shows that the prevalence of these concentricsets depends on the rings being circular, rather than even slightly elliptical,numbers dropping off dramatically with increasing ellipticity. This isconsistent with CCC's expectations; so also is the crucial fact that whereassome of the rings' radii are found to reach around $15^\circ$, none exceed$20^\circ$. The non-isotropic distribution of the concentric sets may be linkedto previously known anomalous and non-Gaussian CMB features.

On CCC-predicted concentric low-variance circles in the CMB sky