  Quarks of heavy flavors are useful tool to study quark-gluon plasma created
in heavy-ion collisions. Due to their high mass and early production time,
heavy quarks experience the entire evolution of the system created in these
collisions. Open heavy flavor meson measurements are sensitive to the energy
loss in the QGP, while quarkonia are sensitive to the temperature of the QGP as
they dissociate because of Debye-like screening of color charges.
  This presentation is a summary of the latest heavy flavor studies performed
at RHIC. Results from both STAR and PHENIX experiments are presented, compared
to theoretical calculations and the implications discussed.
