Description: At the top of our planet lies a magical realm of snow and ice – the Arctic. Every year it is transformed by an annual cycle of freeze and thaw. For millennia, this steady seasonal beat has allowed life to thrive. But our planet is warming, upsetting this natural balance and the Arctic is changing faster than anywhere else on Earth. Scientists are now discovering that what happens here, affects us all. Narrated by Benedict Cumberbatch, find out where to watch Arctic: Our Frozen Planet in your region: http://www.thearcticfilm.com/theaters Subscribe: http://bit.ly/BBCEarthSub #Arctic #BBCEarth Watch more: Planet Earth http://bit.ly/PlanetEarthPlaylist Blue Planet http://bit.ly/BluePlanetPlaylist Planet Earth II http://bit.ly/PlanetEarthIIPlaylist Planet Dinosaur https://bit.ly/PlanetDinosaurPlaylist Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. Here you'll find 50 years worth of entertaining and thought-provoking natural history content. Dramatic, rare, and exclusive, nature doesn't get more exciting than this. This is a commercial page from BBC Studios. Service information and feedback: http://bbcworldwide.com/vod-feedback--contact-details.aspx