Hořava-Lifshitz gravity: a status report

Abstract

This is intended to be a brief introduction and overview of Horava-Lifshitz\ngravity. The motivation and all of the various version of the theory (to date)\nare presented. The dynamics of the theory are discussed in some detail, with a\nfocus on low energy viability and consistency, as these have been the issues\nthat attracted most of the attention in the literature so far. Other properties\nof the theory and developments within its framework are also covered, such as:\nits relation to Einstein-aether theory, cosmology, and future perspectives.\n