Detailed molecular dynamics simulations of the rotational and the translational motions of Gay-Berne ellipsoids in a sea of Lennard-Jones spheres were carried out. It was found that while the translational motion of an ellipsoid was isotropic at low density, it became increasingly anisotropic with density until the ratio of the parallel to the perpendicular diffusion coefficients became nearly equal to the value of the aspect ratio at high density. The latter was in agreement with the prediction of Navier-Stokes hydrodynamics with slip boundary condition. The product of the translational diffusion coefficient and the rotational correlation time also attains a hydrodynamic-like density independent behavior only at high density. The reorientational correlation function became non-exponential at high density and low temperature where it also developed a slow decay. The perpendicular component of the velocity time correlation function exhibited a clear double minimum, only at high density, which became more pronounced as the aspect ratio was increased.Anisotropic Diffusion of Non-Spherical Molecules in Dense Liquids: a Molecular Dynamics Simulation of Isolated Ellipsoids in the Sea of Spheres. Ravichandran, S., Bagchi, B.: Journal of Chemical Physics, 1999, 111[16], 7505-11