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A bimetric gravity model with a variable speed of light is shown to be inagreement with the results reported from the Planck satellite in 2013. Thepredicted scalar mode spectral index is $n_s\approx 0.96$ and its running is$\alpha_s\approx 8\times 10^{-4}$ when the fundamental length scale $\ell_0$ inthe model is fixed to be $\ell_0\approx 10^5\ell_P$, where $\ell_P$ is thePlanck length $\ell_P=1.62\times 10^{-33}\,{\rm cm}$, giving the observed CMBfluctuations: $\delta_H\approx 10^{-5}$. The enlarged lightcone ensures thathorizon and flatness problems are solved. The model is free from many of thefine-tuning problems of the inflationary models and the fluctuations that formthe seeds of structure formation do not lead to a chaotic inhomogeneousuniverse and the need for a multiverse.

Bimetric Gravity, Variable Speed of Light Cosmology and Planck2013