  Does Nature yield any manifestations of parity violation other than those
observed in weak interactions? A map of the cosmic microwave background (CMB)
temperature and polarization will provide a new signature of P violation. We
give two examples of new P violating interactions, which may have something to
do with Planck-scale physics, inflation, and/or quintessence, that would give
rise to such a signature. Although these effects would most likely elude
detection by MAP and the Planck Surveyor, they may be detectable with a future
dedicated CMB polarization experiment.
