  The goal of the ultra-relativistic heavy ion program is to study Quantum
Chromodynamics under finite temperature and density conditions. After a couple
of decades of experiment, the focus at the top RHIC and the LHC energy has
evolved to quantitative understanding of properties of the hot and dense
medium, namely the strongly-coupled Quark Gluon Plasma (sQGP) created in these
heavy-ion collisions, and to constrain transport parameters of the sQGP medium.
Heavy quarks offer unique insights towards detailed understanding of the sQGP
properties due to their large masses. Recent collider and detector advances
have enabled precision measurements of heavy quark hadron production in
heavy-ion collisions.
  In this talk, I will review recent results from heavy quark production
measurements at RHIC and the LHC. These high quality data will offer stringent
constraints on theoretical model calculations and help precision determination
of QGP medium transport parameters. Finally, I look forward to a more
prospective future of the heavy quark program with further improved detectors
at both RHIC and the LHC.
