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Chris puts Bran the Common Raven to the test. Will he be able to work out the 7 steps to unlock the treat at the centre of the puzzle? Subscribe: Watch more: Planet Earth Blue Planet Planet Earth II Planet Dinosaur 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. Want to share your views with the team? Join our BBC Studios Voice: This is a commercial page from BBC Studios. Service information and feedback:
