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Nature 452, 158-161 (13 March 2008) | doi:10.1038/452158a; Published online 12 March 2008

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Cosmology: Patchy solutions

George Ellis1

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The Universe seems to be expanding ever faster — a phenomenon generally ascribed to the influence of 'dark energy'. But might the observed acceleration be a trick of the light in an inhomogeneous Universe?

Ten years ago, observations of distant supernovae brought a startling realization: the Universe's expansion is apparently accelerating. This observation required a quick patch-up of the dynamics of cosmologists' standard 'concordance' model of the Universe.

  1. George Ellis is in the Department of Mathematics and Applied Mathematics, University of Cape Town, Rondebosch 7701, South Africa.
    Email: george.ellis@uct.ac.za

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