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population has doubled since hunting was banned
[[Image:Polar_bears.jpg|left|thumb|200px|A mother polar bear and her two cubs]]
[[Image:Polar_bears.jpg|left|thumb|200px|A mother polar bear and her two cubs]]
The polar bear is on the [[Endangered Species List]] in the [[United States]]. The current world population is estimated at around 22-27,000.<ref>http://www.naturecanada.ca/climate_change_polar.asp</ref>
The polar bear is on the [[Endangered Species List]] in the [[United States]]. The current world population is estimated at around 22-27,000, around twice what it was in the 1960s.<ref>http://www.naturecanada.ca/climate_change_polar.asp</ref>
Polar bears have been known to [[interbreed]] with [[grizzly bear]]s in the wild, producing a polar-grizzly hybrid.<ref>http://www.msnbc.msn.com/id/12738644/GT1/8199/</ref>
Polar bears have been known to [[interbreed]] with [[grizzly bear]]s in the wild, producing a polar-grizzly hybrid.<ref>http://www.msnbc.msn.com/id/12738644/GT1/8199/</ref>