Lawrence Berkeley National Laboratory
Parity is known to be an exact symmetry of strong interaction described by QCD. The possibility of briefly breaking such a symmetry in an abnormal domain created by smashing heavy ions into each other with very high energies has recently generated significant interests due to experimental measurement of charged particle correlations by the STAR collaboration at RHIC, which seems
to be consistent with such a possibility in some aspects. In this talk I will explain the basic theoretical ideas and the experimental results. The status and prospect of unambiguously observing the
local parity violation in heavy ion collisions will also be discussed.