Polar bears spend the winter in their dens. Pregnant females give birth around early January and nurse their cubs through spring, when the family emerges to slowly make its way to the sea ice.

The amount of time cubs spent outside their dens varied from minutes to hours. Some mothers also switched dens and moved their families. Polar bears typically give birth around New Year’s Day to blind ...

Female polar bears build their dens in snow drifts on land or sea ice around October or November. They give birth in December or early January when the cubs are blind, hairless and weigh just 0.5 kg.

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After nearly a decade of trying to learn details about polar bears’ denning habits in the Arctic, researchers have captured cubs emerging from dens on video for the first time. The footage was ...

when polar bears give birth to and nurse their cubs. Past research has established that polar bear cubs’ odds of survival are impacted by how long their mothers spend denning. However, the underlying ...

Female polar bears give birth in December or early January when the cubs are blind, hairless and weigh just 0.5 kg. Scientists have uncovered a surprising feature of polar bear fur: a natural oil ...

Remote cameras in Norway have given us the first detailed look at polar bear cubs emerging from their dens, in videos more than 10 years in the making. The first months of a polar bear (Ursus ...

Two-year-old twin polar bears Kallik (pronounced Kah-LEEK), left, and Kallu (Kah-LOO) take a swim during their public debut ...

Scientists captured polar bear cubs emerging from their dens in a world-first in Svalbard, Norway. Experts say the footage, which was part of a study published in the Journal of Wildlife Management on ...

If they mate and Crystal successfully gives birth, she would raise the cubs for about two years ... and educated the public on the challenges polar bears face in the wild. The polar bear ...