Ancient Aliens: Crystal City Discovered Under Antarctica (Season 18)
1 year ago
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[{"text":"During an Arctic expedition, naval officer Richard Byrd makes a very unusual discovery, in this clip from Season 18, \"Secrets of\u00a0..."}]
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{"title":"Ancient Aliens: Crystal City Discovered Under Antarctica (Season 18) by HISTORY 4,429,096 views 1 year ago 5 minutes, 27 seconds","duration":"5 minutes, 27 seconds"}