Tom Mustill joins anatomist Joy Reidenberg to investigate a dead fin whale, seeking to determine its cause of death. This clip is from 'Natural World: Humpback Whales - A Detective Story'

Tom Mustill joins anatomist Joy Reidenberg to investigate a dead fin whale, seeking to determine its cause of death. This clip is from 'Natural World: Humpback Whales - A Detective Story' (2019).

Welcome to BBC Earth, home to 50 years of dramatic and exclusive natural history content. For more wildlife documentaries, subscribe to BBC Earth: http://bit.ly/BBCEarthSub. Sign up for our newsletter: https://www.bbcearth.com/newsletter. This is a commercial page from BBC Studios. For service information and feedback, visit: http://bbcworldwide.com/vod-feedback--contact-details.aspx.

Witness dramatic Yellowstone moments, from otter-eagle clashes to nature's master builders. BBC Earth brings you 50 years of captivating natural history, showcasing the world's beauty and wonder

Witness dramatic Yellowstone moments, from otter-eagle clashes to nature's master builders. BBC Earth brings you 50 years of captivating natural history, showcasing the world's beauty and wonder through dramatic, rare, and exclusive content.

Subscribe to BBC Earth for more incredible wildlife documentaries. Explore playlists like Best of BBC Earth, Planet Earth III, and Frozen Planet II. Sign up for our newsletter for the latest updates. These clips are from 'Great American Thaw' (2017).

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A vet examines an otter to prevent overheating, exploring how otters insulate themselves through meticulous grooming. This clip is from 'Natural World: Supercharged Otters'

A vet examines an otter to prevent overheating, exploring how otters insulate themselves through meticulous grooming. This clip is from 'Natural World: Supercharged Otters' (2017).

Discover more captivating natural history content from BBC Earth. Subscribe for updates, or sign up for our newsletter to explore a vast library of dramatic and exclusive nature documentaries. For service information, visit BBC Worldwide.

Witness the animal kingdom's greatest fights, from stingrays ambushing crabs to lionesses hunting warthogs. BBC Earth offers 50 years of dramatic, rare, and exclusive natural history content,

Witness the animal kingdom's greatest fights, from stingrays ambushing crabs to lionesses hunting warthogs. BBC Earth offers 50 years of dramatic, rare, and exclusive natural history content, exploring the world's beauty and wonder.

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Cameraman Charlie Hamilton James, captivated by otters for 25 years, reveals their survival secrets and explains why they are so special. This clip is taken from 'Natural World: Supercharged

Cameraman Charlie Hamilton James, captivated by otters for 25 years, reveals their survival secrets and explains why they are so special. This clip is taken from 'Natural World: Supercharged Otters' (2017).

Welcome to BBC Earth, your source for 50 years of entertaining and thought-provoking natural history content. Discover dramatic, rare, and exclusive nature stories from around the world.

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Explore the captivating world of romance in the wild, from intricate frog mating rituals to penguins competing among thousands of potential partners. Subscribe

Explore the captivating world of romance in the wild, from intricate frog mating rituals to penguins competing among thousands of potential partners. Subscribe to BBC Earth for 50 years of dramatic, rare, and exclusive natural history content, showcasing the planet's beauty and wonder.

For the latest news and updates, sign up for our newsletter. Discover popular series like Planet Earth III, Frozen Planet II, and Blue Planet II in 4K, alongside our Best of BBC Earth collection. This content is brought to you by BBC Studios.

Welcome to BBC Earth, your destination for 50 years of captivating natural history. Immerse yourself in amazing stories, beauty, and wonder, featuring dramatic, rare, and exclusive content from

Welcome to BBC Earth, your destination for 50 years of captivating natural history. Immerse yourself in amazing stories, beauty, and wonder, featuring dramatic, rare, and exclusive content from across the globe.

Subscribe for more incredible wildlife and nature documentaries: http://bit.ly/BBCEarthSub. Sign up for our newsletter to receive the latest news and exclusives: https://www.bbcearth.com/newsletter. Explore our extensive library of content, including iconic series like Planet Earth and Blue Planet.

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Welcome to BBC Earth, your destination for 50 years of captivating natural history content. Explore the world's beauty, stories, and wonders through dramatic, rare, and exclusive nature

Welcome to BBC Earth, your destination for 50 years of captivating natural history content. Explore the world's beauty, stories, and wonders through dramatic, rare, and exclusive nature programming.

Subscribe to [BBC Earth](http://bit.ly/BBCEarthSub) and sign up for our [newsletter](https://www.bbcearth.com/newsletter) for the latest updates and exclusives. Dive into our extensive library, featuring popular series like [Planet Earth III](https://bit.ly/PlanetEarthIIIPlaylist) and [Frozen Planet II](https://bit.ly/FrozenPlanetIIPlaylist), plus curated collections of animal fights and best-of moments.

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Eight-week-old otter pups are learning essential survival skills, including swimming, at a rehabilitation centre. This clip is from 'Natural World: Supercharged Otters' (2017).

Welcome to

Eight-week-old otter pups are learning essential survival skills, including swimming, at a rehabilitation centre. This clip is from 'Natural World: Supercharged Otters' (2017).

Welcome to BBC Earth, home to 50 years of dramatic and thought-provoking natural history content. Subscribe for more amazing stories and sign up for our newsletter to stay updated. Explore our extensive library, including shows like Planet Earth III and Blue Planet II in 4K.

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Experience Africa's extraordinary wildlife, from giraffes competing for dominance to hatchlings struggling for survival. BBC Earth brings you 50 years of dramatic, rare, and exclusive natural

Experience Africa's extraordinary wildlife, from giraffes competing for dominance to hatchlings struggling for survival. BBC Earth brings you 50 years of dramatic, rare, and exclusive natural history content, showcasing the world's beauty and wonder.

Subscribe to BBC Earth for more captivating wildlife stories: http://bit.ly/BBCEarthSub. Get the latest updates via our newsletter: https://www.bbcearth.com/newsletter. Discover more content, including Best of BBC Earth, Planet Earth III, and Blue Planet II in 4K.

This is a commercial page from BBC Studios. For service information and feedback, visit: http://bbcworldwide.com/vod-feedback--contact-details.aspx.