Ancient Aliens - Season 18 - Eps 2: Mystery of the Standing Stones
It is one of the greatest mysteries of the prehistoric world: why did people on nearly every continent erect giant standing stones? According to Ancient Astronaut Theorists, the placement of these monoliths and their geological makeup could point to extraterrestrial intervention--and. quite possibly, a technology that once existed on Earth far more advanced than our own.
About Ancient Aliens

Title: Ancient Aliens
First Air Date: 2010-04-20
Last Air Date: 2025-03-07
Status: Returning Series
Rating: 6.8/10 (from 260 votes)
Language: EN
Seasons: 22
Total Episodes: 267
Network: History
Genres: Documentary, Mystery, Sci-Fi & Fantasy
Production Companies: Prometheus Entertainment
Synopsis
Did intelligent beings from outer space visit Earth thousands of years ago? From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate.
Cast

Robert Clotworthy
Narrator (voice)

Giorgio A. Tsoukalos
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