In this paper; http://arxiv.org/abs/1405.7860, What is the distance to the CMB? How relativistic corrections remove the tension with local H0 measurements, it is suggested cosmological distance may be miscalculated due to failure to take into account systematic accumulation of lensing effects. The authors go on to suggest this may explain the tension between local and cosmological measurements of the Hubble constant and could mean the universe may, in fact, be closed.(adsbygoogle = window.adsbygoogle || []).push({});

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# Closed universe?

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