Good old human negative selection... No! It is positive selection. This is why the species is surviving,and not rare or extinct. Rick Rodich Minneapolis, MN _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>