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        Part of It's Okay To Be Smart
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        Exoplanets: Are There Other Earths? | It's Okay to be Smart | PBS Digital Studios

        Thanks to modern astronomy, we know that the Milky Way is home to perhaps a hundred billion planets! In the past two decades, these exoplanet discoveries have spawned new questions about our universe, and if there might be another Earth, or other life, somewhere out there. What does that mean for us?

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