‘A wildlife expedition guide has shared a video of the “most extreme bear interaction” he has seen in his 25 years on the job. The clip, which you can watch below, shows two huge male grizzly bears locked in a vicious fight for dominance at Lake Clark National Park and Preserve, Alaska….’ (Advnture)

More than eight minutes’ incredible video of the majesty and brutality, marred only by intermittent voiceover by the photographer.