  A brief review of a history of data collection and interpretation of the
results on high energy A+A collisions is presented. Basic assumptions and main
results of a statistical model of the early stage of the A+A collisions are
discussed. It is concluded that a broad set of experimental data is in
agreement with the hypothesis that QGP is created in central A+A (S+S and
Pb+Pb) collisions at the SPS. Carefull experimental investigation of the A+A
collisions in the energy region between top AGS and SPS energies is needed.
