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Filmmaker Bertie Gregory records the first-ever video of the two predators facing each other in the Canadian Arctic.
About Bertie Gregory

Wildlife filmmaker Bertie Gregory has channeled a childhood obsession with wildlife into photography. Photos from this obsession earned him recognition early on in his career, including been named a National Geographic Young Explorer and the Youth Outdoor Photographer of the Year. Bertie's goal is to now find stories that get people to fall in love with the natural world and show that looking after wildlife is more than just a nice thing to do, it's crucial to all our futures.

Inside the Making of "The Big Freeze"