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Scientists step back 145 million years to tell the story of 'Big Al', a complete skeleton of an adolescent Allorsaurus found in Wyoming in 1991. The story starts in the Atlantic coast of Portugal where the discovery of remarkable fossils of dinousaur egg shells shed light on how Big Al was born. Fascinating clip from the BBC natural history programme Walking with Dinosaurs: The Ballad of Big Al. Visit www.bbcearth.com for all the latest animal news and wildlife videos and watch more high quality videos on the new BBC Earth YouTube channel |
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| Time: 03:44 | More in Pets & Animals |
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