Hořava-Lifshitz gravity: A status report

Abstract

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