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　　EP01 改变行星的大灾难（Catastrophes that Changed the Planets）EP02 太阳的邪恶双子星 涅墨西斯（Nemesis: The Sun's Evil Twi

　　美国国防部前雇员声称存在一个秘密政府项目，该项目已调查并隐瞒了外星智慧的证据长达80多年。

　　第十二季 (播出目录) (2017) Season 12 https://www.history.com/shows/ancient-aliens/season-12

　　In 2017, it was revealed that the Department of Defense recently spent millions investigating repo