Abstract
The most recent data of NA49 on hadron production in nuclear collisions at CERN SPS energies are presented. Anomalies in the energy dependence of pion and kaon production in central Pb+Pb collisions are observed. They suggest that the onset of deconfinement is located at about 30 A GeV. Large multiplicity and transverse momentum fluctuations are measured for collisions of intermediate mass systems at 158 A GeV. The need for a new experimental programme at the CERN SPS is underlined.
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