  There are numerous examples of very nearly degenerate states of opposite
parity in molecular physics. The ammonia maser is based on one such double.
Theory shows that these parity doubles can occur if the nuclear shape in the
molecule is reflection-asymmetric because the time scales of the shape and the
electronic cloud are well-separated. Parity doubles occur in nuclear physics as
well for odd $A \sim 219-229$. We discuss the theoretical foundation of these
doubles and on that basis suggest that parity doubles should occur in particle
physics too. In particular they should occur among baryons composed of $cbu$
and $cbd$ quarks.
