Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Marek Gazdzicki (born 9 June 1956) is a Polish high-energy nuclear physicist, and the initiator and spokesperson of the NA61/SHINE experiment at the CERN Super Proton Synchrotron (SPS). He, along with Mark I. Gorenstein, predicted the threshold energy of the quark-gluon plasma production (the so-called "onset of deconfinement") in high energy nucleus-nucleus collisions. These predictions have been confirmed by the NA49 experiment at the CERN SPS within the energy scan programme which was started by him and Peter Seyboth.