  Recent experimental progresses in controlling classical and quantum fluids
have made it possible to realize acoustic analogues of gravitational black
holes, where a flowing fluid provides an effective spacetime on which sound
waves propagate, demonstrating Hawking-like radiation and Penrose
superradiance. We propose the exciting possibility that new hydrodynamic
systems might provide insights to help resolve mysteries associated with
quantum gravity, including the black hole information-loss paradox and the
removal of spacetime singularities.
