Three Ignored Densities, Frame-Independent Thermodynamics and Broken   Galilean Symmetry
  A system's invariance under Galilean transformation implies three locally conserved densities. Including them as variables, the thermodynamics is rendered explicitly frame independent, dissipative mass currents are shown to vanish, and spontaneously broken Galilean symmetry becomes a sensible concept in condensed systems. 
Peter Kost\"adt and Mario Liu, (Institut f\"ur Theoretische Physik,   Universit\"at Hannover, Hannover, Germany, EC)