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        Part of It's Okay To Be Smart
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        Evolution: The Book of Life | It's Okay to Be Smart

        The book of life was written by genes and DNA; reading that book has helped us learn that everything on Earth is descended from a common ancestor. Join Joe Hanson, host of It's Okay to Be Smart, as his friend Eric Schulze, awesome science guy and leader of Thirst DC, in this video discussion on life and what defines a species.

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