What if alien civilizations exist—but chose to hide? Exploring shadow empires, cosmic silence, and the limits of secrecy in space.

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Credits:

Hidden Alien Empires: Shadow Civilizations & Exostellar Realms

Written, Produced & Narrated by: Isaac Arthur

Select imagery/video supplied by Getty Images

Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone

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