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It would go against all their survival instincts if they hibernated in the summer

They give birth to their young during the hibernation period, in the winter

. Being such a large mammal, they need time to nurture their young in relative protection from large males who have no qualms about eating a sows babies. Over the millennial of evolution they have become instinctual about hibernation. By the time the cubs are nine months or so, they have developed enough skills to survive with their mother's help.

After they reach the age of two years they go off on their own

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Ashlee Farrell

Lvl 13
3y ago

What else can I help you with?