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.
Jonathan Rhys Meyers will reunite with the creator of The Tudors when he joins the cast of History's Vikings for Season 5. History announced the popular drama's renewal for a 20-episode fifth season and the addition of Rhys Meyers, although no details have been provided about the actor's role.