  We update our chemical analysis of (strange) hadrons produced at the SPS in
Pb--Pb collisions at 158A GeV and and present a first chemical analysis of RHIC
results. We report that the shape of (anti)hyperon m_T-spectra in a thermal
freeze-out analysis leads to freeze-out conditions found in chemical analysis,
implying sudden strange hyperon production. We discuss how a combined analysis
of several strange hadron resonances of differing lifespan can be used to
understand the dynamical process present during chemical and thermal
freeze-outs. In medium resonance quenching is considered.
