Heat Hyperbolic Diffusion in Planck Gas
  In this paper we investigate the diffusion of the thermal pulse in Planck Gas. We show that the Fourier diffusion equation gives the speed of diffusion, v > c and breaks the causality of the thermal processes in Planck gas .For hyperbolic heat transport v<c and causality is valid 
Miroslaw Kozlowski, Janina Marciak-Kozlowska