Scientists think that Svalbard bears have adapted to recent ice loss by eating more land-based prey.
Polar bears Nanook and Noori enjoy rolling around in the snow at the Peak Wildlife Park near Leek.
Researchers have tracked how the mother, who also has a biological cub, has taken in a second young bear in a rarely documented case.
It's only the 13th known case of adoption out of the 4,600 bears studied for nearly five decades in northern Canada.
University of East Anglia says polar bears are learning to adapt to warmer climates.
Brodie is set for a temporary move from a zoo in Scotland to a park in England.
Drone footage captures a group of polar bears living inside an abandoned research station on Russia's Kolyuchin Island.
A cyclist dresses up as a bear and "urinates" into a canal to highlight awareness of prostate cancer.
Hope had undergone a vital dental procedure before her death, the park announces.
