We study the dynamics of monodisperse hard ellipsoids via a new event-driven molecular dynamics algorithm as a function of volume fraction and aspect ratio X0. We evaluate the translational Dtrans and the rotational Drot diffusion coefficients and the associated isodiffusivity lines in the X0 plane. We observe a decoupling of the translational and rotational dynamics which generates an almost perpendicular crossing of the Dtrans and Drot isodiffusivity lines. While the self-intermediate scatt...