We've sent humans to the moon. We've sent probes to every planet in our solar system. But we've never tried to go to another star before. Yuri Milner has launched the Breakthrough Starshot Initiative to do just that: send man-made probes to the Alpha Centauri system 4.3 light years away. Casey and Scott dive into this initiative, what it will take to make it happen technically, economically, and what it means for human space exploration.

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