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What a weirdly long giraffe nerve can teach us about evolution
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From a single-celled common ancestor, evolution has brought us all of Life’s Greatest Hits — inc... Mais
From a single-celled common ancestor, evolution has brought us all of Life’s Greatest Hits — including butterflies, beetles, bacteria, and human beings. In this episode of Crash Course Biology, we’ll learn how evolution explains life’s unity and diversity. Along the way, we’ll explore the fishy origins of a giraffe’s neck, and find out what a cat’s paw and your own arm have in common.
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