This "position paper" collects the scientific arguments behind the CERN Press
Release of February 10, 2000, which announced evidence for the creation of a
new state of matter in Pb-Pb collisions at the CERN SPS. The data on which this
paper is based were presented in a special seminar at CERN on the same day, a
recording of which can be accessed at
http://www.cern.ch/CERN/Announcements/2000/NewStateMatter/ .Comment: 7 pages LaTeX, no figure
