Baryons produced from unpolarized high energy particle‐particle collisions commonly are polarized: Fromproton ‐ nucleuscollisions &Lgr;0, &Ygr;−, &Sgr;+, &Sgr;−, &Ygr;¯+, &Sgr;0, &Ygr;0, &Sgr;¯−are polarized; but, apparently, &OHgr;−and &Lgr;¯0andp, in identical circumstances, are not polarized. However, &Lgr;¯0is created polarized from unpolarizedp¯pandK+pcollisions. Baryon polarization is a function ofxFandPT; it is independent of the beam particle energy. The origin of baryon polarization remains unknown; so far there is no a good model to explain it. © 2003 American Institute of Physics