  We study the rotational dynamics of {\it inertial} disks and rods in
three-dimensional, homogeneous isotropic turbulence. In particular, we show how
the alignment and the decorrelation time-scales of such spheroids depend,
critically, on both the level of inertia and the aspect ratio of these
particles. These results illustrate the effect of inertia---which leads to a
preferential sampling of the local flow geometry---on the statistics of both
disks and rods in a turbulent flow. Our results are important for a variety of
natural and industrial settings where the turbulent transport of asymmetric,
spheroidal inertial particles is ubiquitous.
