Ancient Aliens - Season 20 Episode 10
Throughout the world there are mysterious ancient stones shaped into perfect spheres; many of them show clear evidence of being manmade and some completely defy explanation; the mystery of the stone spheres could provide clues about humankind's past.
- Sjanger: Documentary, Mystery, Sci-Fi & Fantasy
- Ettromsleilighet: History
- Nøkkelord: paranormal investigation, ancient aliens theory, ufo conspiracy, megalith, petroglyph
- Cast: Robert Clotworthy, Giorgio A. Tsoukalos, Ariel Bar Tzadok, Jonathan Young, David Childress, Erich von Däniken
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