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  2. How ancient people understood the fundamental components of life and the universe | Elements of Life

    How ancient people understood the fundamental components of life and the universe | Elements of Life

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  3. Greece: Myth, Logic, and Science

    Greece: Myth, Logic, and Science

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  4. Carl Sagan's Cosmos S01E07 - The Backbone of Night

    Carl Sagan's Cosmos S01E07 - The Backbone of Night

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