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Cubs begin eating solid food as soon as their mother makes her first kill on the sea ice (about three to four months of age).

Cubs who are born during hibernation spend the most vulnerable part of their life in the safety of their mother’s den. When they finally emerge in spring, the cubs weigh around 6lbs and many can already climb a tree. image: Pixabay.com 9. Polar bear cubs stay in their den for around 60 days Polar bear cubs learn to hunt by watching their mother. Cubs try hunting in their first year, but don't seem to be successful until they're over one year old. Even then, they only spend about 4% of their time hunting. By the time they're two years old they spend about 7% of their time hunting and can catch a seal every five or six days. During their first few weeks of life, polar bear cubs nurse most of the time and stay close to their mother to keep warm. Most adult females give birth once every three years. In populations with access to abundant food, birth occurs once every two years. Delayed implantation assures that the cub is born during the best time of the year for survival and allows the female to get into good physical condition and use her energy for nursing her newborn cubs.The most frequent litter size is two, followed by litters of one. Litters of three are less common than twins or singles, and litters of four are rare. Bears have anywhere from 1-5 cubs at a time, with 2 being the most common number. Most bears are capable of raising 2 cubs, with the exception of the Giant Panda. The Giant panda will often discard the weaker cub in favor of the stronger one, this is more common when the mother has a decreased milk supply or is a first-time mom. image: Pixabay.com 2. Bears have delayed implantation Most dens are on land, within 16 km (10 mi.) of the coast. In some areas, dens are more than 100 km (62 mi.) from the coast. A few polar bears make dens on the sea ice.

There are 8 species of bears in the world, with even more subspecies. The Brown bear alone has over 90 different subspecies. They differ wildly in the climate they prefer, their appearance, and their diets. From the immense Polar bear to the petite Sunbear bear bears show a variety of behaviors and appearances. One thing they all have in common is that they are endlessly fascinating, and have a reputation for being good mothers. What exactly do these “mama bears” have to put up with from their offspring? Keep reading for some cool facts about bear cubs. 10 cool facts about bear cubs 1. Most bears are born as multiples

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Mother polar bears are extremely protective of their young, even risking their own lives in their cubs' defense. Polar bear cubs are born November through January in a den. Mother and cubs emerge from their den in late March or April.