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. "Cub adoption is relatively rare ...

Bear X33991 leading her two cubs along the ice. Dave Sandford / Discover Churchill (Wildlife Photographer, Guide, and Polar Bears International Photo Ambassador) Get the Popular Science daily ...

A mother polar bear has made the decision to adopt - a move that scientists say is extremely rare - and the new family was caught on video. Researchers had tagged the five-year-old mother, also known ...

This is an extremely rare occurrence, researchers said — only 13 instances of the act have occurred in a group of 4,600 polar bears recorded over the last 45 years Researcher Evan Richardson said, "It ...