![Ancient Aliens: Surviving the Alien Apocalypse (Season 9) | History Ancient Aliens: Surviving the Alien Apocalypse (Season 9) | History](https://i.ytimg.com/vi/LQwxB2ysiHE/maxresdefault.jpg)
If extraterrestrials are watching over humanity, Ancient Astronaut Theorists suggest the next great global catastrophe could be caused by our heavenly ancestors in this clip from Season 9, "The Great Flood". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...
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