In late November 2010 Gurzadyan and Penrose made large headlines in the
general media by claiming that they had found observational evidence for
the Big Bang not being the beginning of time. Concentric low-variance
circles in the cosmic microwave background (CMB) temperature were claimed
to be signatures from a cyclic universe going through an infinite number
of Big Bangs, expansions and collapses. This claim was in a matter of
weeks killed by a large number of people, starting with Hans Kristian and
myself. I will in this talk give a brief introduction to cyclic universe
models, and I will show that the low-variance circles in the CMB sky is in
full agreement with the standard cosmological model which includes exactly
one Big Bang.