Scientists log rare case of female polar bear adopting cub: 'They're really good moms'

Canadian researchers tracking bear known as X33991 noticed she had gained a second cub who likely needed helpScientists in Canada have documented a rare case of female polar bear adopting a new cub, in an episode of "curious behaviour" that highlights the complex relationships among the apex Arctic predators.Polar Bears International, a non-profit conservation group, said on Wednesday that when they first placed a GPS collar on a female polar bear in the spring, she had one young cub. But when she was spotted with two cubs of roughly the same age last month, they realized they were witnessing an exceedingly rare case of adoption. Continue reading...