In theory black holes exist with unbounded speeds of propagation
Singapore (SPX) Jan 27, 2015
Lorentz invariance (LI) is a cornerstone of modern physics, and strongly supported by observations. In fact, all the experiments carried out so far are consistent with it, and no evidence to show that such a symmetry needs to be broken at a certain energy scale. Nevertheless, there are various reasons to construct gravitational theories with broken LI.
In particular, our understanding of s —> Read More Here