Two-particle correlations in relativistic heavy-ion collisions

Two-particle momentum correlations between pairs of identical particles pro duced in relativistic heavy-ion reactions can be analyzed to extract the sp acetime structure of the collision fireball. We review recent progress in t he application of this method, based on newly developed theoretical tools a nd new high-quality data from heavy-ion collision experiments. Implications for our understanding of the collision dynamics and for the search for the quark-gluon plasma are discussed.