We see pigeons every day on the street, but we get a whole new perspective when we delve into their bones. Subscribe: bit.ly/BBCEarthSub Watch more: Planet Earth bit.ly/PlanetEarthPlaylist Blue Planet bit.ly/BluePlanetPlaylist Planet Earth II bit.ly/PlanetEarthIIPlaylist Planet Dinosaur bit.ly/PlanetDinoPlaylist Secrets of Bones Why can’t an elephant jump? Why did some lizards get legless? Which bird has a skeleton lighter than its feathers? Why does a whale look like a unicorn? How can a small snake swallow a big crocodile? Can a walrus penis kill a man? The answer to all these questions lie in the secrets of bones. 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 fan panel: tinyurl.com/YouTube-BBCEarth-FanPanel This is a page from BBC Studios who help fund new BBC programmes. Service information and feedback: bbcworldwide.com/vod-feedback--contact-details.aspx

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