  The recent results on relativistic heavy-ion collisions are discussed. The
most convincing quark-gluon plasma signatures at the LHC and the top RHIC
energies are presented. Moreover, the possible methods of evaluating the energy
threshold for deconfinement (onset of deconfinement) are described, and the
corresponding results from the RHIC Beam Energy Scan and the SPS programs are
shown. Additionally, the first signatures of creating dense and collectively
behaving systems in collisions of small nuclei (or even in elementary
interactions) are discussed. Finally, the current status of experimental search
for the critical point of strongly interacting matter is summarized.
