http://www.newsweek.com/polar-bear-zoo-reunion-sisters-detroit-zoo-1796733 > In a scene straight out of a Disney movie, a polar bear that had been estranged from her twin sister for two years after her mother rejected her has finally been reunited with her long-lost sibling. > Laerke had grown up separately from her sister until the cubs reached the age that the bears naturally go separate ways to their mothers.