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To look at the evolution of modern bird feathers, we must start a long time ago, with the dinosaurs from whence they came. We see early incarnations of feathers on dinosaur fossils, and remnants of dinosaurs in a bird's wish bone. Carl Zimmer explores the stages of evolution and how even the reasons for feathers have evolved over millions of years. Lesson by Carl Zimmer, animation by Armella Leung.

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Demetri Lales

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Title:How did feathers evolve? - Carl Zimmer

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