  Transverse momentum spectra for neutral pions have been measured by the WA98
experiment in sqrt{s_{nn}}=17.3 GeV Pb+Pb collisions at the CERN SPS and by the
PHENIX experiment in sqrt{s_{nn}}=130 GeV Au+Au collisions at RHIC. The neutral
pion yields in central collisions for both reaction systems are compared to
scaled transverse momentum spectra for nucleon-nucleon reactions at the
respective energy. At SPS energies neutral pion production at high $p_T$ is
enhanced compared to the n+n reference while at RHIC a significant suppression
of high-pT neutral pions is observed.
