NASA's Unexplained Files
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NASA's Unexplained Files
Tuesday, 18:00
Stonehenge On Mars. A NASA probe captures an image of a familiar structure on the surface of Mars. What made 'Mars Henge'? Plus, how did an Apollo astronaut get sick on the Moon? S3, Ep13
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Secret Aliens. Geologists discover alien deposits on the Earth's surface - and the answer could shed light on the cause of the greatest extinction in its history. S3, Ep12
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