  Basic 1966 physics of Sakharov, Zeldovich and Nambu updated by QCD with
constituent-quark quasiparticles having effective masses fits all masses and
magnetic moments of ground state meson and baryons having no more than one
strange or heavy quark Flavor antisymmetry explains absence of low-lying
exotics and suggests diquark-triquark model and two-state model for $\Theta^+$
pentaquark. Variational approach gives mass bounds for other pentaquarks.
