Polar bears have been known to [[interbreed]] with [[grizzly bear]]s in the wild, producing a polar-grizzly hybrid.<ref>MSNBC: [http://www.msnbc.msn.com/id/12738644/GT1/8199/ "Wild find: Half grizzly, half polar bear"]</ref> | Polar bears have been known to [[interbreed]] with [[grizzly bear]]s in the wild, producing a polar-grizzly hybrid.<ref>MSNBC: [http://www.msnbc.msn.com/id/12738644/GT1/8199/ "Wild find: Half grizzly, half polar bear"]</ref> |