Ranked #2 of 10 in Season 2•+0.2 vs season avg
If ancient aliens visited Earth, can evidence of their existence be found in the mysterious structures that still stand throughout the world? Inexplicably, megalithic structures found on different continents are strikingly similar, and the cutting and moving of the massive stones used to build these
Robert Clotworthy
Narrator (voice)
Giorgio A. Tsoukalos
Self
William Henry
Self
Ariel Bar Tzadok
Self
Jonathan Young
Self
David Childress
Self
Erich von Däniken
Self
Linda Moulton Howe
Self
David Wilcock
Self
George Noory
Self
Philip Coppens
Self
Nick Pope
Self
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"Unexplained Structures" is episode 8 of Ancient Aliens season 2. It scored 7.5/10 from 254 votes, ranking #2 of 10 episodes this season (season average 7.3). It aired on December 16, 2010.
