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.
The third season began airing on 20 February 2015 on Amazon Video. In Australia, the series premiered on 8 August 2013 on SBS One. It was later moved to FX, which debuted the second season on 4 February 2015. Season 3 of Vikings began broadcasting in Australia on SBS One on 19 March 2015.ilmed in Ireland, it premiered on 3 March 2013 in the United States and Canada. Vikings is inspired by the sagas of Viking Ragnar Lothbrok, one of the best-known legendary Norse heroes and notorious as the scourge of England and France.