1. Neil deGrasse Tyson Explains The Drake Equation

    Neil deGrasse Tyson Explains The Drake Equation

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  2. Carl Sagan explains Drake Equation (LECTURE) +links in description- Español CC

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  3. Are Humans Really the First Civilization on Earth? | Silurian Hypothesis

    Are Humans Really the First Civilization on Earth? | Silurian Hypothesis

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  4. The Fermi Paradox With Neil deGrasse Tyson - Part 2 - Where Is Everybody?

    The Fermi Paradox With Neil deGrasse Tyson - Part 2 - Where Is Everybody?

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  5. NASA’s Design for Message Heading to Jupiter’s Moon Europa

    NASA’s Design for Message Heading to Jupiter’s Moon Europa

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