Narwhal The Arctic unicorn | Nature’s Great Events
In a unique aerial sequence, the migration of narwhal with their distinctive unicorn-like tusks is filmed for the first time. The whales' journey is risky as they travel along giant cracks in the ice. If the ice were to close above them, they would drown.
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Wild Weather: Our World Under Threat | Panorama
Justin Rowlatt reveals where in the world the climate is changing the fastest and who will be most affected.
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Wind: The Invisible Force | Wild Weather with Richard Hammond
Richard Hammond investigates how wind actually starts. He walks into the centre of a man-made tornado and visits one of the windiest places on Earth.