MENDOZA, Argentina (AP) — Argentina's last captive polar bear will remain in the country despite a petition by more than a half million people asking that it be moved to Canada. Animal rights advocates say the bear, named Arturo, paces nervously in his concrete enclosure and they suggest the animal suffers from depression. "If you love animals the way I do, please sign the petition to help the Argentinian polar bear, Arturo," Gingrich recently wrote on his Facebook page, where he posted a video clip in support of the move. [...] zoo director Gustavo Pronotto said Arturo suffers only the typical ailments of old age, which would make relocation too risky because he would have to be sedated to travel.