 Third, how are these laws framed in a relativistic universe? They were developed in the nineteenth century with a classical spacetime background in mind. How do we write the theory in a modern formulation? Surprisingly, the issue is as much conceptual as technical. The correct (special) relativistic transformation rules for thermodynamic quantities are controversial. Do Lorentz boosted gases appear hotter or colder in the new inertial frame? Albert Einstein himself answered the question about the gas differently throughout his life! With all the current activity of physicists being focused on the thermodynamics of black holes in general relativity and quantum gravity, it is amusing to note that special relativistic thermodynamics is still a field with many open questions, both physically and philosophically (see Earman 1981 and Liu 1994).