Ancient Aliens: The Purpose of Stonehenge (Season 11, Episode 4) | History

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Originally built as early as 4000 years ago, this structure is just one of a larger network in the Salisbury Plain that ancient astronaut theorists believe are more than just ritual sites in this clip from Season 11, Episode 4, “The New Evidence”. #AncientAliens
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“Ancient Aliens” explores the controversial theory that extraterrestrials have visited Earth for millions of years.

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