Ancient Aliens

4:00 AM to 5:00 AM
Monday 18 August
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The Crop Circle Code

Season 15 Episode 2

More than 10,000 crop circle formations have been documented and many display properties that defy explanation. Could they be of otherworldly origin?

Ancient Aliens airs on Sky History at 4:00 AM, Monday 18 August. (Subtitles.)
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