After feeding through the summer and fall, gaining as much weight as possible, pregnant female polar bears prepare to enter maternity dens to give birth to their cubs. To build a … 展开

Wild polar bear cubs are most often born in December. The mother gives birth to 1-3 cubs, with twins most common. The family remains in the den until spring. While in the den, the mother … 展开

Totally dependent on their mothers, newborn cubs are blind, toothless, and covered with soft white fur. They weigh little more than 1/2 kg (1 lb) and are just 30-35 cm long (12 to 1… 展开

Polar bear families generally emerge from their dens in March or April when the cubs are strong enough to survive in outside Arctic conditions and make the trek to sea ice. Now, mothe… 展开