Bears hibernate during the winter months in most areas of the world. Duration of winter denning is dependent upon latitude and varies from a few days or weeks for black bears in Mexico to 6 months or more for bears in Alaska (Kolenosky and Strathearn 1987, Haroldson et al. 2002).
On March 17, 2016, History renewed Vikings for a fifth season of 20 episodes, which is set to premiere on November 29, 2017.
With season 3 of the TV show Vikings in full effect, it's time to explore what's in store for viewers this season. For all the spoilers on the new season, click here.