Researchers in northern Canada have observed a rare case of polar bear adoption, capturing video footage of a wild female bear caring for a cub that was not her own. The footage was captured during the annual polar bear migration along the Western Hudson Bay in Churchill, Manitoba, widely known as the polar capital of the world. Canadian researchers encountered the mother in the spring as she left her maternity den. She had only one cub, which was tagged, a common practice to aid study of the po