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  1. Exoplanets like earth | Discovering Alien Worlds | Are We Alone in the Universe? | Kepler's Legacy

    Exoplanets like earth | Discovering Alien Worlds | Are We Alone in the Universe? | Kepler's Legacy

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  2. Discovering exoplanets

    Discovering exoplanets

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  3. What If Earth's Core Stopped Spinning?

    What If Earth's Core Stopped Spinning?

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