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The Evolutionary Epic: Crash Course Big History #5

In which John Green, Hank Green, and Emily Graslie teach you about evolution. So, in the last 3.8 billion years, life on Earth has evolved from single-celled prokaryotes to the dizzying array of life we have today. So how did all this happen? We’ll talk about Darwin, evolution, natural selection, and how we got fromContinue reading “The Evolutionary Epic: Crash Course Big History #5”

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Life Begins: Crash Course Big History #4

In which Hank and John Green teach you about life on Earth. They won’t be giving advice on how life should be lived, because this is a history series. Instead, they’ll teach you about the earliest forms of life on Earth, and some of the ways that they developed into the types of life weContinue reading “Life Begins: Crash Course Big History #4”