Crash Course Pods: The Universe

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Ep. 4: When The Stars Turned On

In this episode, the universe begins to become visible to itself. Dr. Katie Mack teaches John Green about the moment the stars turned on, while John seeks to answer one question... do humans matter to the universe?

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  Ep. 11: How It All Ends

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  Ep. 10: The Future

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  Ep. 9: The Cosmos and Us

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  Ep. 8: Life In Our Universe

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  Ep. 7: What’s Keeping the Stars Apart

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  Ep. 6: The Story of Dark Matter

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  Ep. 5: Black Holes

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  Ep. 3: The Dark Ages of the Cosmos

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  Ep. 2: Why We Can Exist

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  Ep. 1: The First Fraction of a Second

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  Trailer: The Universe with John Green and Dr. Katie Mack