  A brief summary of some of the main consequences of spontaneous Lorentz
violation in gravity is presented, including evasion of a no-go theorem,
concomitant spontaneous diffeomorphism breaking, the appearance of massless
Nambu-Goldstone modes and massive Higgs modes, and the possibility of a Higgs
mechanism in gravity.

High Energy Physics - Theory;General Relativity and Quantum Cosmology