A female polar bear swam 687 km across the freezing Beaufort Sea over nine days, a feat first reported in 2011. The video ...

or live fat, or both," said Kristin Laidre, a University of Washington marine mammal scientist who specializes in Arctic ...

Remote cameras were deployed in the Arctic mountains across nearly a decade; Valuable footage of moms and cubs emerging from ...

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 ...

In the end, one bear is crowned the Fat Bear Week champion. This week’s event will take place from October 2-8. Every day ...

Above-ambient temperatures also indicate a bear in a den ... down high-energy milk, mother polar bears don’t feed at all during this time and rely on their fat reserves, losing up to 43 per ...

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 ...

“Polar bear mothers are having increasing difficulties ... They grow quickly, nursing on their mom’s milk which is 31% fat, reaching around 10kg – up to 20 times their birth weight ...

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 ...

Polar bear mothers in the Arctic generally give birth ... nursing on milk that’s about 31 percent fat. By the time they are ready to leave the den in the spring, they are up to 20 times bigger ...

A polar bear! Its thick fur helps it to hide and keep ... A seal sitting on the ice! They have lots of fat under their skin that keeps them warm. A penguin off to look for food.