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.

when bears give birth then emerge with their cubs. Past research has shown that how long polar bear mothers remain at their dens impacts cubs’ odds of survival. Yet why they stick around for so ...

Polar bears usually give birth around New Year, at which point the cubs are blind, hairless, and weigh just half a kilo (1.1 lb). They emerge from their birthing dens between February and April of ...

when bears give birth then emerge with their cubs. Past research has shown that how long polar bear mothers remain at their dens impacts cubs' odds of survival. Yet why they stick around for so ...

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

Pregnant polar bear females usually enter the den in late autumn and remain there throughout the winter. They don't eat ...

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 ...

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 ...

Crystal has had nine cubs, but is nearing the end of her reproductive years. Polar bears can mate into April, Macek said. “We’re sad to see him go, but we’re glad he’ll have the ...