BERLIN -- Germany's oldest zoo, which is home to the world's largest variety of species, welcomed an adorable polar bear cub. Polar bear mother Tonja gave birth to her cub on Dec. 1. The cub has ...

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 ...

Scientists studying polar bears were greeted with a most unexpected surprise during a recent tracking expedition in northeastern Manitoba. A polar bear mother and her cub were walking near Churchill ...

When scientists in Canada came across a female polar bear with two cubs in the fall, they made an unusual discovery: One of the young was not her own offspring but instead a rare documented example of ...

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 ...

Scientists have captured rare footage of female polar bears and their newborn cubs emerging from maternal dens in the Arctic. Using remote cameras and satellite collars, researchers were able to track ...

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 ...