A photographer's iconic shots of polar bears in abandoned buildings on a Russian island shines a spotlight on wider changes ...

Alaska’s brown bears can rival polar bears in terms of size ... peg-like ears and a short, blocky muzzle. Fat Bear Week is an online competition hosted by the Katmai National Park and Preserve ...

Neither albino nor polar bear, the spirit bear (also known ... This bear's bigger and more confident than the Gribbell Island bear. Fat rolls down its belly. It appears to be wearing a coat ...

or live fat, or both," said Kristin Laidre, a University of Washington marine mammal scientist who specializes in Arctic species. The polar bear — the symbol of both climate change and an area ...

How much they weigh: From as little as 60 pounds (27 kilograms) to more than 1,700 pounds (771 kg) ...

Polar bear cubs are incredibly cute — and amazingly elusive ... The cubs grow to about 20 times their birthweight by spring, due to high fat content in their mother’s milk. They leave their dens ...

The great white polar bear is the youngest and largest of the world's bear species — a mighty hunter and fierce defender of its young that's among the world's most vulnerable animals. Two-thirds of ...

One of the great marvels of nature is how bears, the largest carnivore in North America, are able to hibernate all winter, ...

While the bears enjoy soaking up the sun, warmer weather triggers several physiological changes. Baxendell explained polar ...

“As sea ice melts earlier and forms later across the Arctic, polar bears are onshore for longer and some bears will deplete their fat stores and become nutritionally stressed. A hungry bear will ...

Their thick white coat and a layer of fat keep them warm and camouflaged in their harsh ... Emmanuel Rondeau / WWF-UK "I will never forget my 'first' polar bear. Today, it still drives me to do all we ...

The heaviest recorded polar bear was 2,210 pounds (1,002 kg ... and its body uses stored fat to stay alive. When they hibernate, bears' bodies avoid breaking down the protein in their muscle ...